A271581 Magic sums of 4 X 4 magic squares composed of triangular numbers and squares.

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

Offset

1,1

Links

Table of n, a(n) for n=1..52.

Index entries for sequences related to magic squares

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 A364968 A161854

Adjacent sequences: A271578 A271579 A271580 * A271582 A271583 A271584

Keyword

nonn

Author

Arkadiusz Wesolowski, Apr 10 2016

Status

approved