n | a(n) |
---|---|
1 | 4 |
2 | 36 |
3 | 250 |
4 | 1718 |
5 | 11988 |
6 | 83518 |
7 | 581518 |
8 | 4049700 |
9 | 28202318 |
10 | 196400270 |
11 | 1367728548 |
12 | 9524845126 |
13 | 66330898142 |
14 | 461927514284 |
15 | 3216857242006 |
16 | 22402152254494 |
17 | 156008298702684 |
18 | 1086439775514766 |
19 | 7565952552767646 |
20 | 52689195775528564 |
[4,36,250,1718,11988,83518,581518,4049700, 28202318,196400270,1367728548,9524845126, 66330898142,461927514284,3216857242006, 22402152254494,156008298702684,1086439775514766, 7565952552767646,52689195775528564] |