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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 14 |
| 3 | 34 |
| 4 | 69 |
| 5 | 69 |
| 6 | 3072 |
| 7 | 39758 |
| 8 | 228484 |
| 9 | 775433 |
| 10 | 1932763 |
| 11 | 3965261 |
| 12 | 7139167 |
| 13 | 11720721 |
| 14 | 17976163 |
| 15 | 26171733 |
| 16 | 36573671 |
| 17 | 49448217 |
| 18 | 65061611 |
| 19 | 83680093 |
| 20 | 105569903 |
| 21 | 130997281 |
| 22 | 160228467 |
| 23 | 193529701 |
| 24 | 231167223 |
| 25 | 273407273 |
| 26 | 320516091 |
| 27 | 372759917 |
[4,14,34,69,69,3072,39758,228484,775433,1932763, 3965261,7139167,11720721,17976163,26171733, 36573671,49448217,65061611,83680093,105569903, 130997281,160228467,193529701,231167223,273407273, 320516091,372759917] |