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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 76 |
| 3 | 521 |
| 4 | 3571 |
| 5 | 24476 |
| 6 | 167761 |
| 7 | 1149851 |
| 8 | 7881196 |
| 9 | 54018521 |
| 10 | 370248451 |
| 11 | 2537720636 |
| 12 | 17393796001 |
| 13 | 119218851371 |
| 14 | 817138163596 |
| 15 | 5600748293801 |
| 16 | 38388099893011 |
| 17 | 263115950957276 |
| 18 | 1803423556807921 |
| 19 | 12360848946698171 |
[1,11,76,521,3571,24476,167761,1149851,7881196, 54018521,370248451,2537720636,17393796001, 119218851371,817138163596,5600748293801, 38388099893011,263115950957276,1803423556807921, 12360848946698171] |