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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1260 |
| 4 | 5895 |
| 5 | 26845 |
| 6 | 123709 |
| 7 | 574560 |
| 8 | 2652823 |
| 9 | 12235080 |
| 10 | 56562528 |
| 11 | 261375285 |
| 12 | 1207084221 |
| 13 | 5576420791 |
| 14 | 25763656492 |
| 15 | 119015522955 |
| 16 | 549803070176 |
| 17 | 2539953311868 |
| 18 | 11733758509383 |
| 19 | 54205846730505 |
| 20 | 250413745670973 |
[16,256,1260,5895,26845,123709,574560,2652823, 12235080,56562528,261375285,1207084221,5576420791, 25763656492,119015522955,549803070176, 2539953311868,11733758509383,54205846730505, 250413745670973] |