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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 38 |
| 5 | 196 |
| 6 | 1064 |
| 7 | 5988 |
| 8 | 34632 |
| 9 | 204672 |
| 10 | 1231082 |
| 11 | 7514052 |
| 12 | 46433088 |
| 13 | 289976404 |
| 14 | 1827459072 |
| 15 | 11608240000 |
| 16 | 74249294704 |
| 17 | 477826080368 |
| 18 | 3091718252320 |
| 19 | 20101537759256 |
| 20 | 131262924427560 |
| 21 | 860504352317040 |
| 22 | 5661120688863216 |
| 23 | 37363827222888640 |
| 24 | 247331149667685440 |
| 25 | 1641642515512685408 |
| 26 | 10923380539408947456 |
| 27 | 72850297774044995328 |
| 28 | 486886413558080754198 |
| 29 | 3260469757311730139044 |
| 30 | 21874082006618739609864 |
[1,2,8,38,196,1064,5988,34632,204672,1231082, 7514052,46433088,289976404,1827459072,11608240000, 74249294704,477826080368,3091718252320, 20101537759256,131262924427560,860504352317040, 5661120688863216,37363827222888640, 247331149667685440,1641642515512685408, 10923380539408947456,72850297774044995328, 486886413558080754198,3260469757311730139044, 21874082006618739609864] |