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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 72 |
| 3 | 335 |
| 4 | 1366 |
| 5 | 4948 |
| 6 | 16115 |
| 7 | 47659 |
| 8 | 129463 |
| 9 | 326522 |
| 10 | 771653 |
| 11 | 1722005 |
| 12 | 3652726 |
| 13 | 7406710 |
| 14 | 14426468 |
| 15 | 27103102 |
| 16 | 49288384 |
| 17 | 87029344 |
| 18 | 149600861 |
| 19 | 250930856 |
| 20 | 411535151 |
| 21 | 661105246 |
| 22 | 1041922558 |
| 23 | 1613307461 |
| 24 | 2457351181 |
| 25 | 3686223670 |
[12,72,335,1366,4948,16115,47659,129463,326522, 771653,1722005,3652726,7406710,14426468,27103102, 49288384,87029344,149600861,250930856,411535151, 661105246,1041922558,1613307461,2457351181, 3686223670] |