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| n | a(n) |
|---|---|
| 1 | 426 |
| 2 | 3056 |
| 3 | 21814 |
| 4 | 157852 |
| 5 | 1148940 |
| 6 | 8334390 |
| 7 | 60321850 |
| 8 | 437145312 |
| 9 | 3170639968 |
| 10 | 22986654954 |
| 11 | 166589069278 |
| 12 | 1207529662436 |
| 13 | 8754117362818 |
| 14 | 63459178604360 |
| 15 | 459991788481964 |
| 16 | 3334414119424578 |
| 17 | 24171289384341708 |
| 18 | 175216213885020152 |
[426,3056,21814,157852,1148940,8334390,60321850, 437145312,3170639968,22986654954,166589069278, 1207529662436,8754117362818,63459178604360, 459991788481964,3334414119424578, 24171289384341708,175216213885020152] |