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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 19 |
| 2 | 80 |
| 3 | 372 |
| 4 | 1887 |
| 5 | 10340 |
| 6 | 60727 |
| 7 | 379831 |
| 8 | 2516880 |
| 9 | 17590607 |
| 10 | 129185101 |
| 11 | 993686245 |
| 12 | 7982964121 |
| 13 | 66815548603 |
| 14 | 581342199992 |
| 15 | 5247733142922 |
| 16 | 49060074341483 |
| 17 | 474248427057490 |
| 18 | 4733396660516715 |
| 19 | 48713824251499499 |
| 20 | 516315132698019888 |
| 21 | 5629552607340558361 |
[5,19,80,372,1887,10340,60727,379831,2516880, 17590607,129185101,993686245,7982964121, 66815548603,581342199992,5247733142922, 49060074341483,474248427057490,4733396660516715, 48713824251499499,516315132698019888, 5629552607340558361] |