n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 6 |
7 | 23 |
8 | 77 |
9 | 240 |
10 | 705 |
11 | 1988 |
12 | 5468 |
13 | 14724 |
14 | 39006 |
15 | 101818 |
16 | 261924 |
17 | 663748 |
18 | 1655781 |
19 | 4062110 |
20 | 9793065 |
21 | 23186825 |
22 | 53896597 |
23 | 122975627 |
24 | 275449464 |
25 | 605794093 |
26 | 1308633243 |
27 | 2777847319 |
28 | 5797093774 |
29 | 11900199553 |
30 | 24042491094 |
31 | 47833081481 |
32 | 93765335118 |
33 | 181200186060 |
34 | 345389067067 |
35 | 649704599010 |
[0,0,0,0,1,6,23,77,240,705,1988,5468,14724,39006, 101818,261924,663748,1655781,4062110,9793065, 23186825,53896597,122975627,275449464,605794093, 1308633243,2777847319,5797093774,11900199553, 24042491094,47833081481,93765335118,181200186060, 345389067067,649704599010] |