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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 19 |
| 3 | 90 |
| 4 | 266 |
| 5 | 615 |
| 6 | 1221 |
| 7 | 2184 |
| 8 | 3620 |
| 9 | 5661 |
| 10 | 8455 |
| 11 | 12166 |
| 12 | 16974 |
| 13 | 23075 |
| 14 | 30681 |
| 15 | 40020 |
| 16 | 51336 |
| 17 | 64889 |
| 18 | 80955 |
| 19 | 99826 |
| 20 | 121810 |
| 21 | 147231 |
| 22 | 176429 |
| 23 | 209760 |
| 24 | 247596 |
| 25 | 290325 |
| 26 | 338351 |
| 27 | 392094 |
| 28 | 451990 |
| 29 | 518491 |
| 30 | 592065 |
| 31 | 673196 |
| 32 | 762384 |
| 33 | 860145 |
| 34 | 967011 |
| 35 | 1083530 |
| 36 | 1210266 |
| 37 | 1347799 |
| 38 | 1496725 |
| 39 | 1657656 |
| 40 | 1831220 |
[0,1,19,90,266,615,1221,2184,3620,5661,8455,12166, 16974,23075,30681,40020,51336,64889,80955,99826, 121810,147231,176429,209760,247596,290325,338351, 392094,451990,518491,592065,673196,762384,860145, 967011,1083530,1210266,1347799,1496725,1657656, 1831220] |