n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 10 |
5 | 27 |
6 | 118 |
7 | 389 |
8 | 1688 |
9 | 6357 |
10 | 28302 |
11 | 117301 |
12 | 541832 |
13 | 2418649 |
14 | 11629794 |
15 | 55165477 |
16 | 276131564 |
17 | 1379441105 |
18 | 7178203950 |
19 | 37525908261 |
20 | 202624599112 |
21 | 1103246397377 |
22 | 6168861375178 |
23 | 34853267706981 |
24 | 201412524836788 |
25 | 1177304020632257 |
26 | 7018267240899110 |
[0,0,1,2,10,27,118,389,1688,6357,28302,117301, 541832,2418649,11629794,55165477,276131564, 1379441105,7178203950,37525908261,202624599112, 1103246397377,6168861375178,34853267706981, 201412524836788,1177304020632257,7018267240899110] |