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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 11 |
| 3 | 102 |
| 4 | 93 |
| 5 | 1832 |
| 6 | 647 |
| 7 | 30842 |
| 8 | 6033 |
| 9 | 510284 |
| 10 | 42043 |
| 11 | 8262614 |
| 12 | 380045 |
| 13 | 133347960 |
| 14 | 2642327 |
| 15 | 2139557706 |
| 16 | 24834593 |
| 17 | 34302142876 |
| 18 | 172787563 |
| 19 | 549239552710 |
| 20 | 1557238205 |
| 21 | 8792528867144 |
| 22 | 10828788263 |
| 23 | 140705018800538 |
| 24 | 101703894897 |
| 25 | 2251563959401132 |
| 26 | 707629994011 |
[1,4,11,102,93,1832,647,30842,6033,510284,42043, 8262614,380045,133347960,2642327,2139557706, 24834593,34302142876,172787563,549239552710, 1557238205,8792528867144,10828788263, 140705018800538,101703894897,2251563959401132, 707629994011] |