n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 12 |
3 | 45 |
4 | 168 |
5 | 627 |
6 | 2340 |
7 | 8733 |
8 | 32592 |
9 | 121635 |
10 | 453948 |
11 | 1694157 |
12 | 6322680 |
13 | 23596563 |
14 | 88063572 |
15 | 328657725 |
16 | 1226567328 |
17 | 4577611587 |
18 | 17083879020 |
19 | 63757904493 |
20 | 237947738952 |
21 | 888033051315 |
22 | 3314184466308 |
23 | 12368704813917 |
24 | 46160634789360 |
25 | 172273834343523 |
26 | 642934702584732 |
27 | 2399464975995405 |
28 | 8954925201396888 |
29 | 33420235829592147 |
[0,3,12,45,168,627,2340,8733,32592,121635,453948, 1694157,6322680,23596563,88063572,328657725, 1226567328,4577611587,17083879020,63757904493, 237947738952,888033051315,3314184466308, 12368704813917,46160634789360,172273834343523, 642934702584732,2399464975995405,8954925201396888, 33420235829592147] |