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 A271581 Magic sums of 4 X 4 magic squares composed of triangular numbers and squares. 2
 251, 305, 317, 341, 362, 366, 371, 377, 387, 389, 410, 421, 427, 431, 434, 435, 440, 446, 455, 458, 470, 482, 483, 484, 490, 494, 497, 500, 506, 512, 515, 519, 521, 523, 525, 536, 546, 547, 548, 550, 551, 553, 563, 566, 572, 575, 578, 580, 584, 586, 590, 591 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE Examples of 4 X 4 magic squares composed of triangular numbers and squares. . |---|---|---|---| | 6 | 10|210| 25| |---|---|---|---| | 81|121| 21| 28| |---|---|---|---| | 64|105| 4 | 78| |---|---|---|---| |100| 15| 16|120| |---|---|---|---| The magic constant is 251 = a(1). . |---|---|---|---| | 4 | 10| 81|210| |---|---|---|---| |105|144| 55| 1 | |---|---|---|---| |171| 15| 91| 28| |---|---|---|---| | 25|136| 78| 66| |---|---|---|---| The magic constant is 305 = a(2). CROSSREFS Cf. A271578, A271579. Sequence in context: A201547 A165281 A033449 * A142419 A161854 A234928 Adjacent sequences:  A271578 A271579 A271580 * A271582 A271583 A271584 KEYWORD nonn AUTHOR Arkadiusz Wesolowski, Apr 10 2016 STATUS approved

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Last modified April 5 03:58 EDT 2020. Contains 333238 sequences. (Running on oeis4.)