A265197 Magic sums of 3 X 3 semimagic squares composed of triangular numbers.

711, 1251, 1527, 1712, 2132, 2486, 2616, 2812, 2934, 3357, 3441, 3781, 3812, 4156, 4288, 4842, 4971, 4972, 5034, 5346, 5382, 5659, 5842, 5886, 6147, 6159, 6402, 6734, 6747, 7062, 7312, 7403, 7592, 7722, 8034, 8102, 8342, 8831, 8862, 8961, 9092, 9117

Offset

1,1

Comments

These semimagic squares are composed of 9 distinct triangular numbers >= 0.

Links

Table of n, a(n) for n=1..42.

Wikipedia, Triangular number

Index entries for sequences related to magic squares

Example

A semimagic square with sum 1527:
  |----|----|----|
  | 0  |351 |1176|
  |----|----|----|
  |666 |741 |120 |
  |----|----|----|
  |861 |435 |231 |
  |----|----|----|

Crossrefs

Cf. A000217, A265141, A265198, A269060 (for positive triangular numbers).

Sequence in context: A252965 A187283 A187280 * A269060 A265142 A251031

Adjacent sequences: A265194 A265195 A265196 * A265198 A265199 A265200

Keyword

nonn

Author

Arkadiusz Wesolowski, Dec 04 2015

Status

approved