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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 14 |
| 2 | 122 |
| 3 | 898 |
| 4 | 6086 |
| 5 | 39394 |
| 6 | 248102 |
| 7 | 1536178 |
| 8 | 9409046 |
| 9 | 57227074 |
| 10 | 346467782 |
| 11 | 2091269458 |
| 12 | 12597590006 |
| 13 | 75785795554 |
| 14 | 455516874662 |
| 15 | 2736312874738 |
| 16 | 16430733386966 |
| 17 | 98635853704834 |
| 18 | 592021022116742 |
| 19 | 3552949991056018 |
| 20 | 21320996155647926 |
| 21 | 127939164097754914 |
| 22 | 767687740219762022 |
[1,14,122,898,6086,39394,248102,1536178,9409046, 57227074,346467782,2091269458,12597590006, 75785795554,455516874662,2736312874738, 16430733386966,98635853704834,592021022116742, 3552949991056018,21320996155647926, 127939164097754914,767687740219762022] |