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| n | a(n) |
|---|---|
| 1 | 3639 |
| 2 | 4720 |
| 3 | 6931 |
| 4 | 10477 |
| 5 | 18526 |
| 6 | 37469 |
| 7 | 82676 |
| 8 | 194708 |
| 9 | 483572 |
| 10 | 1255700 |
| 11 | 3383156 |
| 12 | 9387668 |
| 13 | 26645492 |
| 14 | 76907540 |
| 15 | 224670836 |
| 16 | 661915028 |
| 17 | 1961556212 |
| 18 | 5836296980 |
| 19 | 17412153716 |
| 20 | 52042992788 |
| 21 | 155742047732 |
| 22 | 466452288020 |
| 23 | 1397809159796 |
[3639,4720,6931,10477,18526,37469,82676,194708, 483572,1255700,3383156,9387668,26645492,76907540, 224670836,661915028,1961556212,5836296980, 17412153716,52042992788,155742047732,466452288020, 1397809159796] |