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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 15 |
| 3 | 74 |
| 4 | 240 |
| 5 | 597 |
| 6 | 1235 |
| 7 | 2318 |
| 8 | 3978 |
| 9 | 6399 |
| 10 | 9781 |
| 11 | 14388 |
| 12 | 20364 |
| 13 | 28141 |
| 14 | 37907 |
| 15 | 49986 |
| 16 | 64790 |
| 17 | 82711 |
| 18 | 103983 |
| 19 | 129254 |
| 20 | 158720 |
| 21 | 193017 |
| 22 | 232639 |
| 23 | 278134 |
| 24 | 329748 |
| 25 | 388427 |
| 26 | 454593 |
| 27 | 528832 |
| 28 | 611758 |
| 29 | 704263 |
| 30 | 806483 |
| 31 | 919866 |
| 32 | 1044640 |
[1,15,74,240,597,1235,2318,3978,6399,9781,14388, 20364,28141,37907,49986,64790,82711,103983,129254, 158720,193017,232639,278134,329748,388427,454593, 528832,611758,704263,806483,919866,1044640] |