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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 21 |
| 4 | 48 |
| 5 | 112 |
| 6 | 224 |
| 7 | 390 |
| 8 | 656 |
| 9 | 1037 |
| 10 | 1545 |
| 11 | 2245 |
| 12 | 3158 |
| 13 | 4300 |
| 14 | 5757 |
| 15 | 7554 |
| 16 | 9713 |
| 17 | 12339 |
| 18 | 15463 |
| 19 | 19111 |
| 20 | 23409 |
| 21 | 28392 |
| 22 | 34092 |
| 23 | 40654 |
| 24 | 48119 |
| 25 | 56523 |
| 26 | 66032 |
| 27 | 76691 |
| 28 | 88542 |
| 29 | 101770 |
| 30 | 116426 |
| 31 | 132556 |
| 32 | 150366 |
| 33 | 169911 |
[1,1,6,21,48,112,224,390,656,1037,1545,2245,3158, 4300,5757,7554,9713,12339,15463,19111,23409,28392, 34092,40654,48119,56523,66032,76691,88542,101770, 116426,132556,150366,169911] |