n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 26 |
4 | 200 |
5 | 1691 |
6 | 15204 |
7 | 142710 |
8 | 1382568 |
9 | 13721765 |
10 | 138802136 |
11 | 1425785270 |
12 | 14832383488 |
13 | 155947271878 |
14 | 1654494195340 |
15 | 17690004381000 |
16 | 190426309700616 |
17 | 2062071992480208 |
18 | 22447191471665160 |
19 | 245501068961175090 |
20 | 2696300196714320520 |
21 | 29725402250477117175 |
22 | 328835072363241763920 |
[1,4,26,200,1691,15204,142710,1382568,13721765, 138802136,1425785270,14832383488,155947271878, 1654494195340,17690004381000,190426309700616, 2062071992480208,22447191471665160, 245501068961175090,2696300196714320520, 29725402250477117175,328835072363241763920] |