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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 26 |
| 3 | 51 |
| 4 | 372 |
| 5 | 167 |
| 6 | 7208 |
| 7 | 12047 |
| 8 | 70608 |
| 9 | 103583 |
| 10 | 1803424 |
| 11 | 3531839 |
| 12 | 23226176 |
| 13 | 15919743 |
| 14 | 489767552 |
| 15 | 695759103 |
| 16 | 4439588096 |
| 17 | 7728286207 |
| 18 | 115362646528 |
| 19 | 213392442367 |
| 20 | 1628112843776 |
| 21 | 651082770431 |
| 22 | 31377048479744 |
| 23 | 49253787832319 |
| 24 | 314205864185856 |
| 25 | 469379750076415 |
[1,1,26,51,372,167,7208,12047,70608,103583, 1803424,3531839,23226176,15919743,489767552, 695759103,4439588096,7728286207,115362646528, 213392442367,1628112843776,651082770431, 31377048479744,49253787832319,314205864185856, 469379750076415] |