n | a(n) |
---|---|
0 | 1 |
1 | 12 |
2 | 90 |
3 | 548 |
4 | 2986 |
5 | 15284 |
6 | 74309 |
7 | 346716 |
8 | 1571119 |
9 | 6992940 |
10 | 30875360 |
11 | 136381936 |
12 | 607183046 |
13 | 2742567784 |
14 | 12641133025 |
15 | 59750365748 |
16 | 290733288513 |
17 | 1460096920092 |
18 | 7578070997402 |
19 | 40648251605280 |
20 | 225116682011442 |
[1,12,90,548,2986,15284,74309,346716,1571119, 6992940,30875360,136381936,607183046,2742567784, 12641133025,59750365748,290733288513, 1460096920092,7578070997402,40648251605280, 225116682011442] |