n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 15 |
3 | 90 |
4 | 336 |
5 | 951 |
6 | 2247 |
7 | 4676 |
8 | 8856 |
9 | 15597 |
10 | 25927 |
11 | 41118 |
12 | 62712 |
13 | 92547 |
14 | 132783 |
15 | 185928 |
16 | 254864 |
17 | 342873 |
18 | 453663 |
19 | 591394 |
20 | 760704 |
21 | 966735 |
22 | 1215159 |
23 | 1512204 |
24 | 1864680 |
25 | 2280005 |
26 | 2766231 |
27 | 3332070 |
28 | 3986920 |
29 | 4740891 |
30 | 5604831 |
31 | 6590352 |
[0,1,15,90,336,951,2247,4676,8856,15597,25927, 41118,62712,92547,132783,185928,254864,342873, 453663,591394,760704,966735,1215159,1512204, 1864680,2280005,2766231,3332070,3986920,4740891, 5604831,6590352] |