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| n | a(n) |
|---|---|
| 1 | 50 |
| 2 | 124 |
| 3 | 311 |
| 4 | 775 |
| 5 | 1895 |
| 6 | 4663 |
| 7 | 11518 |
| 8 | 28446 |
| 9 | 70145 |
| 10 | 172951 |
| 11 | 426630 |
| 12 | 1052487 |
| 13 | 2596184 |
| 14 | 6403675 |
| 15 | 15795627 |
| 16 | 38963018 |
| 17 | 96109484 |
| 18 | 237070048 |
| 19 | 584773118 |
| 20 | 1442444418 |
| 21 | 3558040343 |
| 22 | 8776520278 |
| 23 | 21648797430 |
| 24 | 53400493513 |
| 25 | 131721540000 |
[50,124,311,775,1895,4663,11518,28446,70145, 172951,426630,1052487,2596184,6403675,15795627, 38963018,96109484,237070048,584773118,1442444418, 3558040343,8776520278,21648797430,53400493513, 131721540000] |