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62

The smallest squares containingk 62's :
625 = 2521625625 = 12752,   626250625 = 250252,
16262625625 = 1275252,   336262622626225 = 183374652.

The second integer which is the sum of a square and a prime in 4 ways :
  12 + 61, 32 + 53, 52 + 37, 72 + 13.

1 / 62 = 0.016129..., 16129 = 1272.

622 is the 4th square which is the sum of 8 fourth powers : [2,2,2,5,5,5,5,6].

62k + 73k + 266k + 440k are squares for k = 1,2,3 (292, 5232, 102292).

Komachi Fraction : (9/62)2 = 3645/172980.

Komachi equations:
622 = - 9 * 8 - 7 + 654 * 3 * 2 - 1 = 9 - 8 - 7 + 6 * 5 * 4 * 32 + 10
622 = 98 / 7 + 6 * 5 * 4 * 32 - 10,
622 = 12 + 232 - 42 + 562 + 72 + 82 + 92 = - 122 * 32 + 42 + 52 - 62 - 72 + 82 * 92
  = - 12 + 22 + 32 + 42 * 52 - 672 + 892 = 92 + 82 + 72 + 652 - 42 * 32 * 22 + 12
  = 982 / 72 + 652 - 42 * 32 * 22 - 12 = 92 * 82 + 72 + 62 - 52 * 42 - 322 - 12
  = 982 - 762 + 52 / 42 * 322 / 102 = 92 - 82 - 72 + 62 + 542 + 322 - 102
  = - 92 + 82 - 72 * 62 + 52 / 42 * 32 * 22 * 102 = - 92 + 82 * 72 + 62 * 52 - 42 + 32 - 22 - 102.

622 = 13 + 53 + 73 + 153.

(622 - 4) = (42 - 4)(182 - 4),
(622 + 6) = (42 + 6)(132 + 6) = (72 + 6)(82 + 6) = (12 + 6)(22 + 6)(72 + 6).

12 + 22 + 32 + 42 + ... + 622 = 81375, which consists of different digits.

(1 + 2)(3 + 4 + ... + 17)(18 + 19 + ... + 62) = 9002,
(1 + 2 + 3)(4 + 5 + ... + 12)(13 + 14 + ... + 62) = 9002,
(1 + 2 + 3)(4 + 5 + ... + 17)(18 + 19 + ... + 62) = 12602,
(1 + 2 + ... + 6)(7 + 8 + ... + 42)(43 + 44 + ... + 62) = 44102,
(1 + 15 + ... + 16)(17)(18 + 19 + ... + 62) = 20402,
(1 + 2 + ... + 17)(18 + 19 + ... + 22)(23 + 24 + ... + 62) = 51002,
(1 + 2 + ... + 24)(25 + 26 + ... + 33)(34 + 35 + ... + 62) = 104402,
(1 + 2 + ... + 36)(37)(38 + 39 + ... + 62) = 55502.

(12 + 22 + 32 + ... + 622) = 81375, which consists of different digits.

(12)(22 + 32 + ... + 62)(72 + 82 + ... + 612)(622) = 1636802,
(12 + 22 + ... + 72)(82 + ... + 242)(252 + ... + 392)(402 + ... + 622) = 251804002,
(12 + 22 + ... + 112)(122 + 132 + ... + 162)(172 + 182 + ... + 392)(402 + 412 + ... + 622) = 240906602,
(12 + 22 + ... + 252)(262 + 272 + ... + 502)(512 + 522 + ... + 612)(622) = 1657942002.

622 = 3844 appears in the decimal expressions of π and e:
  π = 3.14159•••3844••• (from the 123rd digit),
  (3136 is the first 4-digit square in the expression of π,)
  e = 2.71828•••3844••• (from the 4563rd digit).


Page of Squares : First Upload February 2, 2004 ; Last Revised January 31, 2011
by Yoshio Mimura, Kobe, Japan