n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 66 |
5 | 243 |
6 | 934 |
7 | 3702 |
8 | 14991 |
9 | 61728 |
10 | 257760 |
11 | 1089242 |
12 | 4650510 |
13 | 20029566 |
14 | 86912034 |
15 | 379572697 |
16 | 1667173042 |
17 | 7359859750 |
18 | 32638991596 |
19 | 145339269594 |
20 | 649585008500 |
21 | 2913037850738 |
22 | 13103443046264 |
23 | 59107608896504 |
24 | 267315011379549 |
25 | 1211823493295456 |
26 | 5505730777691531 |
27 | 25065801196926460 |
[1,2,6,19,66,243,934,3702,14991,61728,257760, 1089242,4650510,20029566,86912034,379572697, 1667173042,7359859750,32638991596,145339269594, 649585008500,2913037850738,13103443046264, 59107608896504,267315011379549,1211823493295456, 5505730777691531,25065801196926460] |