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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 14 |
| 4 | 49 |
| 5 | 134 |
| 6 | 296 |
| 7 | 580 |
| 8 | 1034 |
| 9 | 1720 |
| 10 | 2691 |
| 11 | 4043 |
| 12 | 5841 |
| 13 | 8193 |
| 14 | 11178 |
| 15 | 14935 |
| 16 | 19567 |
| 17 | 25197 |
| 18 | 31954 |
| 19 | 40006 |
| 20 | 49521 |
| 21 | 60596 |
| 22 | 73442 |
| 23 | 88238 |
| 24 | 105158 |
| 25 | 124432 |
| 26 | 146220 |
| 27 | 170802 |
| 28 | 198278 |
| 29 | 228999 |
| 30 | 263185 |
| 31 | 300988 |
| 32 | 342775 |
| 33 | 388775 |
| 34 | 439269 |
| 35 | 494462 |
| 36 | 554839 |
| 37 | 620474 |
| 38 | 691717 |
| 39 | 769060 |
| 40 | 852639 |
[0,2,14,49,134,296,580,1034,1720,2691,4043,5841, 8193,11178,14935,19567,25197,31954,40006,49521, 60596,73442,88238,105158,124432,146220,170802, 198278,228999,263185,300988,342775,388775,439269, 494462,554839,620474,691717,769060,852639] |