n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 21 |
3 | 182 |
4 | 910 |
5 | 3255 |
6 | 9331 |
7 | 22876 |
8 | 49932 |
9 | 99645 |
10 | 185185 |
11 | 324786 |
12 | 542906 |
13 | 871507 |
14 | 1351455 |
15 | 2034040 |
16 | 2982616 |
17 | 4274361 |
18 | 6002157 |
19 | 8276590 |
20 | 11228070 |
21 | 15009071 |
22 | 19796491 |
23 | 25794132 |
24 | 33235300 |
25 | 42385525 |
26 | 53545401 |
27 | 67053546 |
[0,1,21,182,910,3255,9331,22876,49932,99645, 185185,324786,542906,871507,1351455,2034040, 2982616,4274361,6002157,8276590,11228070,15009071, 19796491,25794132,33235300,42385525,53545401, 67053546] |