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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 13 |
| 4 | 99 |
| 5 | 1021 |
| 6 | 12723 |
| 7 | 185053 |
| 8 | 3076419 |
| 9 | 57537661 |
| 10 | 1195682643 |
| 11 | 27332056093 |
| 12 | 681580659939 |
| 13 | 18412990131901 |
| 14 | 535693115608563 |
| 15 | 16698252859863133 |
| 16 | 555206734009942659 |
| 17 | 19614053492975935741 |
| 18 | 733674744650794446483 |
| 19 | 28968157934685913430173 |
[1,1,3,13,99,1021,12723,185053,3076419,57537661, 1195682643,27332056093,681580659939, 18412990131901,535693115608563,16698252859863133, 555206734009942659,19614053492975935741, 733674744650794446483,28968157934685913430173] |