| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 19 |
| 5 | 160 |
| 6 | 3418 |
| 7 | 179705 |
| 8 | 19488053 |
| 9 | 4590422901 |
| 10 | 2738580784946 |
| 11 | 3583015072969210 |
| 12 | 9255051219746866753 |
| 13 | 56916338252385095986978 |
| 14 | 871826913772059843867743765 |
| 15 | 26753845554560439025697319191184 |
| 16 | 1695956186616651065722319776300825712 |
[1,1,2,5,19,160,3418,179705,19488053,4590422901, 2738580784946,3583015072969210, 9255051219746866753,56916338252385095986978, 871826913772059843867743765, 26753845554560439025697319191184, 1695956186616651065722319776300825712] |