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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 0 |
| 6 | 3 |
| 7 | 1 |
| 8 | 6 |
| 9 | 4 |
| 10 | 10 |
| 11 | 11 |
| 12 | 20 |
| 13 | 23 |
| 14 | 32 |
| 15 | 44 |
| 16 | 57 |
| 17 | 77 |
| 18 | 90 |
| 19 | 129 |
| 20 | 150 |
| 21 | 208 |
| 22 | 236 |
| 23 | 334 |
| 24 | 381 |
| 25 | 522 |
| 26 | 595 |
| 27 | 803 |
| 28 | 936 |
| 29 | 1234 |
| 30 | 1435 |
| 31 | 1861 |
| 32 | 2193 |
| 33 | 2770 |
| 34 | 3291 |
| 35 | 4105 |
| 36 | 4884 |
| 37 | 6001 |
| 38 | 7172 |
| 39 | 8678 |
| 40 | 10418 |
| 41 | 12487 |
| 42 | 14969 |
| 43 | 17791 |
| 44 | 21330 |
| 45 | 25164 |
| 46 | 30181 |
| 47 | 35398 |
| 48 | 42337 |
| 49 | 49463 |
| 50 | 59057 |
[0,0,1,0,2,0,3,1,6,4,10,11,20,23,32,44,57,77,90, 129,150,208,236,334,381,522,595,803,936,1234,1435, 1861,2193,2770,3291,4105,4884,6001,7172,8678, 10418,12487,14969,17791,21330,25164,30181,35398, 42337,49463,59057] |