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| n | a(n) |
|---|---|
| 1 | 5000 |
| 2 | 21632 |
| 3 | 75272 |
| 4 | 262088 |
| 5 | 916658 |
| 6 | 3220722 |
| 7 | 11309768 |
| 8 | 39783200 |
| 9 | 139846088 |
| 10 | 491348552 |
| 11 | 1725311282 |
| 12 | 6060344418 |
| 13 | 21285209138 |
| 14 | 74766898208 |
| 15 | 262625483282 |
| 16 | 922568228082 |
| 17 | 3240635377778 |
| 18 | 11383319836800 |
| 19 | 39985279887938 |
[5000,21632,75272,262088,916658,3220722,11309768, 39783200,139846088,491348552,1725311282, 6060344418,21285209138,74766898208,262625483282, 922568228082,3240635377778,11383319836800, 39985279887938] |