n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 46 |
5 | 172 |
6 | 750 |
7 | 3120 |
8 | 14087 |
9 | 61571 |
10 | 284436 |
11 | 1281379 |
12 | 6008651 |
13 | 27633271 |
14 | 130944600 |
15 | 611154458 |
16 | 2918673524 |
17 | 13771848825 |
18 | 66164267793 |
19 | 314806106581 |
20 | 1519581215764 |
21 | 7277197766203 |
22 | 35261251918970 |
23 | 169741515939425 |
24 | 825046304792297 |
25 | 3988381669094450 |
26 | 19436472354360319 |
27 | 94285252643418217 |
[1,1,4,11,46,172,750,3120,14087,61571,284436, 1281379,6008651,27633271,130944600,611154458, 2918673524,13771848825,66164267793,314806106581, 1519581215764,7277197766203,35261251918970, 169741515939425,825046304792297,3988381669094450, 19436472354360319,94285252643418217] |