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 A271579 Magic sums of 4 X 4 magic squares composed of triangular numbers. 5
 1402, 1912, 2162, 2164, 2422, 2612, 3362, 3512, 3737, 3952, 4207, 4257, 4322, 4462, 4887, 4972, 5312, 5362, 5442, 5466, 5482, 5593, 5986, 5992, 6162, 6337, 6438, 6532, 6662, 6747, 6792, 6887, 6974, 6987, 7112, 7177, 7437, 7507, 7662, 7975, 8032, 8222 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..42. Index entries for sequences related to magic squares EXAMPLE Examples of 4 X 4 magic squares composed of triangular numbers. . |----|----|----|----| | 66 | 1 | 300|1035| |----|----|----|----| | 465| 630| 171| 136| |----|----|----|----| | 780| 105| 496| 21 | |----|----|----|----| | 91 | 666| 435| 210| |----|----|----|----| The magic constant is 1402 = a(1). . |----|----|----|----| | 1 | 45 | 435|1431| |----|----|----|----| | 300|1326| 276| 10 | |----|----|----|----| |1596| 190| 120| 6 | |----|----|----|----| | 15 | 351|1081| 465| |----|----|----|----| The magic constant is 1912 = a(2). CROSSREFS Cf. A000217, A271580, A271711. Subsequence of A271581. Sequence in context: A271549 A203918 A178271 * A271712 A352239 A206680 Adjacent sequences: A271576 A271577 A271578 * A271580 A271581 A271582 KEYWORD nonn AUTHOR Arkadiusz Wesolowski, Apr 10 2016 STATUS approved

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Last modified April 20 16:37 EDT 2024. Contains 371845 sequences. (Running on oeis4.)