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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 14 |
| 3 | 56 |
| 4 | 98 |
| 5 | 392 |
| 6 | 685 |
| 7 | 2688 |
| 8 | 4552 |
| 9 | 15120 |
| 10 | 25736 |
| 11 | 85280 |
| 12 | 142472 |
| 13 | 449216 |
| 14 | 746786 |
| 15 | 2286992 |
| 16 | 3776238 |
| 17 | 11015896 |
| 18 | 17976999 |
| 19 | 50832504 |
| 20 | 82322380 |
| 21 | 221230656 |
| 22 | 352869190 |
| 23 | 911581064 |
| 24 | 1437928475 |
| 25 | 3505471976 |
| 26 | 5416379388 |
| 27 | 12529508408 |
| 28 | 18999577833 |
| 29 | 40787934216 |
[1,8,14,56,98,392,685,2688,4552,15120,25736,85280, 142472,449216,746786,2286992,3776238,11015896, 17976999,50832504,82322380,221230656,352869190, 911581064,1437928475,3505471976,5416379388, 12529508408,18999577833,40787934216] |