n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 7 |
4 | 44 |
5 | 266 |
6 | 1599 |
7 | 9597 |
8 | 57586 |
9 | 345520 |
10 | 2073125 |
11 | 12438755 |
12 | 74632536 |
13 | 447795222 |
14 | 2686771339 |
15 | 16120628041 |
16 | 96723768254 |
17 | 580342609532 |
18 | 3482055657201 |
19 | 20892333943215 |
20 | 125354003659300 |
21 | 752124021955810 |
22 | 4512744131734871 |
23 | 27076464790409237 |
24 | 162458788742455434 |
25 | 974752732454732616 |
[0,0,1,7,44,266,1599,9597,57586,345520,2073125, 12438755,74632536,447795222,2686771339, 16120628041,96723768254,580342609532, 3482055657201,20892333943215,125354003659300, 752124021955810,4512744131734871, 27076464790409237,162458788742455434, 974752732454732616] |