n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 23 |
3 | 134 |
4 | 781 |
5 | 4552 |
6 | 26531 |
7 | 154634 |
8 | 901273 |
9 | 5253004 |
10 | 30616751 |
11 | 178447502 |
12 | 1040068261 |
13 | 6061962064 |
14 | 35331704123 |
15 | 205928262674 |
16 | 1200237871921 |
17 | 6995498968852 |
18 | 40772755941191 |
19 | 237641036678294 |
20 | 1385073464128573 |
[1,4,23,134,781,4552,26531,154634,901273,5253004, 30616751,178447502,1040068261,6061962064, 35331704123,205928262674,1200237871921, 6995498968852,40772755941191,237641036678294, 1385073464128573] |