A261987 as a triangular array
| | | | | | | | | 4 |
| | | | | | | | | 8 | | 9 |
| | | | | | | | 25 | | 26 | | 27 |
| | | | | | | 91 | | 92 | | 93 | | 95 |
| | | | | | 115 | | 116 | | 117 | | 119 | | 121 |
| | | | | 527 | | 529 | | 531 | | 532 | | 533 | | 535 |
| | | | 527 | | 529 | | 531 | | 533 | | 535 | | 536 | | 539 |
| | | 1331 | | 1333 | | 1334 | | 1337 | | 1339 | | 1341 | | 1343 | | 1345 |
| | 1331 | | 1333 | | 1334 | | 1337 | | 1339 | | 1341 | | 1343 | | 1345 | | 1349 |
|
A261987 as a square array
4 | 8 | 25 | 91 | 115 | 527 | 527 | 1331 | 1331
| 9 | 26 | 92 | 116 | 529 | 529 | 1333 | 1333
| 27 | 93 | 117 | 531 | 531 | 1334 | 1334
| 95 | 119 | 532 | 533 | 1337 | 1337
| 121 | 533 | 535 | 1339 | 1339
| 535 | 536 | 1341 | 1341
| 539 | 1343 | 1343
| 1345 | 1345
| 1349
|
A261987 as an upper right triangle
4 | 8 | 25 | 91 | 115 | 527 | 527 | 1331 | 1331
| | 9 | 26 | 92 | 116 | 529 | 529 | 1333 | 1333
| | | 27 | 93 | 117 | 531 | 531 | 1334 | 1334
| | | | 95 | 119 | 532 | 533 | 1337 | 1337
| | | | | 121 | 533 | 535 | 1339 | 1339
| | | | | | 535 | 536 | 1341 | 1341
| | | | | | | 539 | 1343 | 1343
| | | | | | | | 1345 | 1345
| | | | | | | | | 1349
|
|