The OEIS is supported by the many generous donors to the OEIS Foundation.
A287899 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 31 |
| 4 | 217 |
| 5 | 1661 |
| 6 | 13721 |
| 7 | 121703 |
| 8 | 1157857 |
| 9 | 11826121 |
| 10 | 129877645 |
| 11 | 1535504015 |
| 12 | 19546846441 |
| 13 | 267633414517 |
| 14 | 3932330905361 |
| 15 | 61806788736551 |
| 16 | 1035452546213441 |
| 17 | 18421374554192017 |
| 18 | 346790652640704725 |
| 19 | 6885640002624595007 |
| 20 | 143771244649798115257 |
[1,1,5,31,217,1661,13721,121703,1157857,11826121, 129877645,1535504015,19546846441,267633414517, 3932330905361,61806788736551,1035452546213441, 18421374554192017,346790652640704725, 6885640002624595007,143771244649798115257] |