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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 64 |
| 3 | 460 |
| 4 | 2633 |
| 5 | 12926 |
| 6 | 55682 |
| 7 | 196527 |
| 8 | 837826 |
| 9 | 3059886 |
| 10 | 9285173 |
| 11 | 26956956 |
| 12 | 72856639 |
| 13 | 184807084 |
| 14 | 541527736 |
| 15 | 1520886410 |
| 16 | 3873955950 |
| 17 | 8929796766 |
| 18 | 20494615529 |
| 19 | 45883467602 |
| 20 | 98229395430 |
| 21 | 209914872426 |
| 22 | 488915652233 |
| 23 | 1113313955086 |
| 24 | 2451792530303 |
| 25 | 5004689907217 |
[8,64,460,2633,12926,55682,196527,837826,3059886, 9285173,26956956,72856639,184807084,541527736, 1520886410,3873955950,8929796766,20494615529, 45883467602,98229395430,209914872426,488915652233, 1113313955086,2451792530303,5004689907217] |