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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 176 |
| 3 | 1076 |
| 4 | 3650 |
| 5 | 11516 |
| 6 | 29536 |
| 7 | 70412 |
| 8 | 145431 |
| 9 | 291683 |
| 10 | 534853 |
| 11 | 956522 |
| 12 | 1600651 |
| 13 | 2633406 |
| 14 | 4126715 |
| 15 | 6386960 |
| 16 | 9505210 |
| 17 | 14002011 |
| 18 | 20025031 |
| 19 | 28396896 |
| 20 | 39265235 |
| 21 | 53923628 |
| 22 | 72565437 |
| 23 | 97086596 |
| 24 | 127619975 |
| 25 | 166939721 |
| 26 | 215170884 |
| 27 | 276186538 |
[25,176,1076,3650,11516,29536,70412,145431,291683, 534853,956522,1600651,2633406,4126715,6386960, 9505210,14002011,20025031,28396896,39265235, 53923628,72565437,97086596,127619975,166939721, 215170884,276186538] |