n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 94 |
4 | 657 |
5 | 4902 |
6 | 38233 |
7 | 307953 |
8 | 2541831 |
9 | 21386810 |
10 | 182754162 |
11 | 1581699162 |
12 | 13836248406 |
13 | 122139271098 |
14 | 1086638457429 |
15 | 9733419373534 |
16 | 87707244737511 |
17 | 794505072627735 |
18 | 7231017033165776 |
19 | 66089527981542462 |
20 | 606340568510978940 |
21 | 5582088822346925210 |
[1,3,15,94,657,4902,38233,307953,2541831,21386810, 182754162,1581699162,13836248406,122139271098, 1086638457429,9733419373534,87707244737511, 794505072627735,7231017033165776, 66089527981542462,606340568510978940, 5582088822346925210] |