n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 13 |
5 | 38 |
6 | 142 |
7 | 495 |
8 | 1999 |
9 | 7639 |
10 | 32410 |
11 | 131732 |
12 | 578108 |
13 | 2451480 |
14 | 11019463 |
15 | 48167875 |
16 | 220369210 |
17 | 985213006 |
18 | 4568163974 |
19 | 20777640886 |
20 | 97351386710 |
21 | 448791075548 |
22 | 2120304847549 |
23 | 9880144320349 |
24 | 46993584507492 |
25 | 220893243761056 |
26 | 1056471472307132 |
27 | 5001575487300376 |
28 | 24031415726411821 |
[1,1,2,4,13,38,142,495,1999,7639,32410,131732, 578108,2451480,11019463,48167875,220369210, 985213006,4568163974,20777640886,97351386710, 448791075548,2120304847549,9880144320349, 46993584507492,220893243761056,1056471472307132, 5001575487300376,24031415726411821] |