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| n | a(n) |
|---|---|
| 4 | 1 |
| 5 | 4 |
| 6 | 10 |
| 7 | 24 |
| 8 | 53 |
| 9 | 106 |
| 10 | 191 |
| 11 | 328 |
| 12 | 528 |
| 13 | 822 |
| 14 | 1230 |
| 15 | 1794 |
| 16 | 2542 |
| 17 | 3534 |
| 18 | 4802 |
| 19 | 6428 |
| 20 | 8460 |
| 21 | 10996 |
| 22 | 14087 |
| 23 | 17870 |
| 24 | 22405 |
| 25 | 27850 |
| 26 | 34286 |
| 27 | 41896 |
| 28 | 50773 |
| 29 | 61148 |
| 30 | 73116 |
| 31 | 86942 |
| 32 | 102751 |
| 33 | 120840 |
| 34 | 141343 |
| 35 | 164618 |
| 36 | 190808 |
| 37 | 220306 |
| 38 | 253292 |
| 39 | 290202 |
| 40 | 331226 |
| 41 | 376872 |
[1,4,10,24,53,106,191,328,528,822,1230,1794,2542, 3534,4802,6428,8460,10996,14087,17870,22405,27850, 34286,41896,50773,61148,73116,86942,102751,120840, 141343,164618,190808,220306,253292,290202,331226, 376872] |