n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 12 |
3 | 52 |
4 | 168 |
5 | 461 |
6 | 1133 |
7 | 2612 |
8 | 5759 |
9 | 12309 |
10 | 25666 |
11 | 52509 |
12 | 105803 |
13 | 210655 |
14 | 415349 |
15 | 812461 |
16 | 1578752 |
17 | 3050921 |
18 | 5868562 |
19 | 11244267 |
20 | 21472441 |
21 | 40887802 |
22 | 77668032 |
23 | 147222550 |
24 | 278556477 |
25 | 526215993 |
26 | 992694708 |
27 | 1870443330 |
28 | 3520594166 |
29 | 6620431857 |
30 | 12439538938 |
[0,2,12,52,168,461,1133,2612,5759,12309,25666, 52509,105803,210655,415349,812461,1578752,3050921, 5868562,11244267,21472441,40887802,77668032, 147222550,278556477,526215993,992694708, 1870443330,3520594166,6620431857,12439538938] |