The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 27 |
| 3 | 79 |
| 4 | 37 |
| 5 | 642 |
| 6 | 3366 |
| 7 | 4397 |
| 8 | 25154 |
| 9 | 137845 |
| 10 | 309382 |
| 11 | 1206207 |
| 12 | 5904494 |
| 13 | 17498116 |
| 14 | 61651672 |
| 15 | 267672528 |
| 16 | 908607719 |
| 17 | 3166116692 |
| 18 | 12672266364 |
| 19 | 45619974681 |
| 20 | 161089019345 |
| 21 | 615680573625 |
| 22 | 2264002238286 |
| 23 | 8118105866800 |
| 24 | 30312478695463 |
[3,27,79,37,642,3366,4397,25154,137845,309382, 1206207,5904494,17498116,61651672,267672528, 908607719,3166116692,12672266364,45619974681, 161089019345,615680573625,2264002238286, 8118105866800,30312478695463] |