n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 19 |
4 | 81 |
5 | 413 |
6 | 2439 |
7 | 14655 |
8 | 86844 |
9 | 573196 |
10 | 4224230 |
11 | 32280154 |
12 | 249433713 |
13 | 1925416359 |
14 | 15732592327 |
15 | 139542345546 |
16 | 1304524118159 |
17 | 12445507282579 |
18 | 119198874300879 |
19 | 1137647406084952 |
20 | 11183828252431175 |
21 | 116368970786569604 |
22 | 1278400213028604214 |
[0,1,4,19,81,413,2439,14655,86844,573196,4224230, 32280154,249433713,1925416359,15732592327, 139542345546,1304524118159,12445507282579, 119198874300879,1137647406084952, 11183828252431175,116368970786569604, 1278400213028604214] |