n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 20 |
4 | 119 |
5 | 817 |
6 | 6338 |
7 | 54707 |
8 | 519184 |
9 | 5366097 |
10 | 59934937 |
11 | 718748131 |
12 | 9203953921 |
13 | 125268224954 |
14 | 1804750726306 |
15 | 27426230051634 |
16 | 438260834123607 |
17 | 7343677070172330 |
18 | 128716143768613600 |
19 | 2354633702684629141 |
20 | 44865189679858465163 |
21 | 888784065003104357924 |
[1,4,20,119,817,6338,54707,519184,5366097, 59934937,718748131,9203953921,125268224954, 1804750726306,27426230051634,438260834123607, 7343677070172330,128716143768613600, 2354633702684629141,44865189679858465163, 888784065003104357924] |