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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 19 |
| 3 | 54 |
| 4 | 124 |
| 5 | 250 |
| 6 | 460 |
| 7 | 790 |
| 8 | 1285 |
| 9 | 2000 |
| 10 | 3001 |
| 11 | 4366 |
| 12 | 6186 |
| 13 | 8566 |
| 14 | 11626 |
| 15 | 15502 |
| 16 | 20347 |
| 17 | 26332 |
| 18 | 33647 |
| 19 | 42502 |
| 20 | 53128 |
| 21 | 65778 |
| 22 | 80728 |
| 23 | 98278 |
| 24 | 118753 |
| 25 | 142504 |
| 26 | 169909 |
| 27 | 201374 |
| 28 | 237334 |
| 29 | 278254 |
| 30 | 324630 |
| 31 | 376990 |
| 32 | 435895 |
| 33 | 501940 |
| 34 | 575755 |
| 35 | 658006 |
| 36 | 749396 |
| 37 | 850666 |
| 38 | 962596 |
[4,19,54,124,250,460,790,1285,2000,3001,4366,6186, 8566,11626,15502,20347,26332,33647,42502,53128, 65778,80728,98278,118753,142504,169909,201374, 237334,278254,324630,376990,435895,501940,575755, 658006,749396,850666,962596] |