n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 50 |
5 | 177 |
6 | 652 |
7 | 2473 |
8 | 9594 |
9 | 37892 |
10 | 151846 |
11 | 615859 |
12 | 2523217 |
13 | 10427471 |
14 | 43415259 |
15 | 181941198 |
16 | 766841846 |
17 | 3248517320 |
18 | 13823977350 |
19 | 59067577266 |
20 | 253315964424 |
21 | 1089998388418 |
22 | 4704475230340 |
23 | 20361365646315 |
24 | 88351705071583 |
25 | 384280788724692 |
26 | 1675063399090659 |
[1,2,5,15,50,177,652,2473,9594,37892,151846, 615859,2523217,10427471,43415259,181941198, 766841846,3248517320,13823977350,59067577266, 253315964424,1089998388418,4704475230340, 20361365646315,88351705071583,384280788724692, 1675063399090659] |