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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 154 |
| 4 | 2062 |
| 5 | 31066 |
| 6 | 504886 |
| 7 | 8652402 |
| 8 | 154208270 |
| 9 | 2832526306 |
| 10 | 53287424374 |
| 11 | 1022143389578 |
| 12 | 19924535352374 |
| 13 | 393685747760714 |
| 14 | 7869272950148382 |
| 15 | 158875743754158098 |
| 16 | 3235672769357219854 |
| 17 | 66405081412501161442 |
| 18 | 1372115409786911859502 |
| 19 | 28524372351269271839610 |
[1,2,14,154,2062,31066,504886,8652402,154208270, 2832526306,53287424374,1022143389578, 19924535352374,393685747760714,7869272950148382, 158875743754158098,3235672769357219854, 66405081412501161442,1372115409786911859502, 28524372351269271839610] |