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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
Sequence in context: A201547 A165281 A033449 * A142419 A364968 A161854
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified May 23 16:36 EDT 2024. Contains 372765 sequences. (Running on oeis4.)