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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 19 |
| 3 | 118 |
| 4 | 446 |
| 5 | 1271 |
| 6 | 3017 |
| 7 | 6300 |
| 8 | 11964 |
| 9 | 21117 |
| 10 | 35167 |
| 11 | 55858 |
| 12 | 85306 |
| 13 | 126035 |
| 14 | 181013 |
| 15 | 253688 |
| 16 | 348024 |
| 17 | 468537 |
| 18 | 620331 |
| 19 | 809134 |
| 20 | 1041334 |
| 21 | 1324015 |
| 22 | 1664993 |
| 23 | 2072852 |
| 24 | 2556980 |
| 25 | 3127605 |
| 26 | 3795831 |
| 27 | 4573674 |
| 28 | 5474098 |
| 29 | 6511051 |
| 30 | 7699501 |
[1,19,118,446,1271,3017,6300,11964,21117,35167, 55858,85306,126035,181013,253688,348024,468537, 620331,809134,1041334,1324015,1664993,2072852, 2556980,3127605,3795831,4573674,5474098,6511051, 7699501] |