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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 8 |
| 4 | 23 |
| 5 | 77 |
| 6 | 177 |
| 7 | 4679 |
| 8 | 9535 |
| 9 | 33284 |
| 10 | 76103 |
| 11 | 109387 |
| 12 | 732425 |
| 13 | 841812 |
| 14 | 44506649 |
| 15 | 45348461 |
| 16 | 316597415 |
| 17 | 361945876 |
| 18 | 1040489167 |
| 19 | 3483413377 |
| 20 | 8007315921 |
| 21 | 211673627323 |
| 22 | 431354570567 |
| 23 | 1505737339024 |
| 24 | 3442829248615 |
| 25 | 4948566587639 |
| 26 | 33134228774449 |
[1,1,7,8,23,77,177,4679,9535,33284,76103,109387, 732425,841812,44506649,45348461,316597415, 361945876,1040489167,3483413377,8007315921, 211673627323,431354570567,1505737339024, 3442829248615,4948566587639,33134228774449] |