n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 9 |
6 | 40 |
7 | 111 |
8 | 643 |
9 | 2261 |
10 | 6176 |
11 | 53560 |
12 | 265001 |
13 | 976535 |
14 | 10699235 |
15 | 65839306 |
16 | 297528021 |
17 | 1096638993 |
18 | 16254932942 |
19 | 131192702293 |
20 | 760059358527 |
21 | 3527632148650 |
22 | 63700463354263 |
23 | 620906514026512 |
24 | 4309068955961383 |
25 | 23776534616426566 |
26 | 110660256825406666 |
[1,1,1,2,5,9,40,111,643,2261,6176,53560,265001, 976535,10699235,65839306,297528021,1096638993, 16254932942,131192702293,760059358527, 3527632148650,63700463354263,620906514026512, 4309068955961383,23776534616426566, 110660256825406666] |