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| n | a(n) |
|---|---|
| 0 | 20 |
| 1 | 21 |
| 2 | 83 |
| 3 | 436 |
| 4 | 519 |
| 5 | 1474 |
| 6 | 10837 |
| 7 | 12311 |
| 8 | 244746 |
| 9 | 257057 |
| 10 | 2044145 |
| 11 | 4345347 |
| 12 | 6389492 |
| 13 | 36292807 |
| 14 | 115267913 |
| 15 | 151560720 |
| 16 | 6177696713 |
| 17 | 6329257433 |
| 18 | 25165469012 |
| 19 | 132156602493 |
| 20 | 157322071505 |
| 21 | 446800745503 |
[20,21,83,436,519,1474,10837,12311,244746,257057, 2044145,4345347,6389492,36292807,115267913, 151560720,6177696713,6329257433,25165469012, 132156602493,157322071505,446800745503] |