n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 9 |
6 | 40 |
7 | 151 |
8 | 571 |
9 | 2897 |
10 | 19730 |
11 | 140190 |
12 | 953064 |
13 | 6708323 |
14 | 54631552 |
15 | 510143776 |
16 | 4987278692 |
17 | 49168919669 |
18 | 505209884549 |
19 | 5638095015594 |
20 | 67921924172174 |
21 | 852861260421398 |
22 | 10992380368532792 |
23 | 147296144926635359 |
24 | 2082906807168675698 |
25 | 30973237281668975230 |
[1,1,1,1,2,9,40,151,571,2897,19730,140190,953064, 6708323,54631552,510143776,4987278692,49168919669, 505209884549,5638095015594,67921924172174, 852861260421398,10992380368532792, 147296144926635359,2082906807168675698, 30973237281668975230] |