n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 10 |
6 | 71 |
7 | 444 |
8 | 2617 |
9 | 14958 |
10 | 84063 |
11 | 467960 |
12 | 2591265 |
13 | 14308722 |
14 | 78911943 |
15 | 435066228 |
16 | 2399404345 |
17 | 13242035030 |
18 | 73150006271 |
19 | 404525810928 |
20 | 2239684086529 |
21 | 12415205896794 |
22 | 68905402034311 |
23 | 382897019146540 |
24 | 2130255439081721 |
25 | 11865617032955070 |
[0,0,0,1,10,71,444,2617,14958,84063,467960, 2591265,14308722,78911943,435066228,2399404345, 13242035030,73150006271,404525810928, 2239684086529,12415205896794,68905402034311, 382897019146540,2130255439081721, 11865617032955070] |