n | a(n) |
---|---|
0 | 1 |
1 | 11 |
2 | 66 |
3 | 285 |
4 | 990 |
5 | 2937 |
6 | 7721 |
7 | 18436 |
8 | 40689 |
9 | 84084 |
10 | 164307 |
11 | 305955 |
12 | 546260 |
13 | 939862 |
14 | 1564782 |
15 | 2529737 |
16 | 3982924 |
17 | 6122379 |
18 | 9207990 |
19 | 13575210 |
20 | 19650477 |
21 | 27968304 |
22 | 39189954 |
23 | 54123564 |
24 | 73745529 |
25 | 99222903 |
26 | 131936520 |
27 | 173504485 |
[1,11,66,285,990,2937,7721,18436,40689,84084, 164307,305955,546260,939862,1564782,2529737, 3982924,6122379,9207990,13575210,19650477, 27968304,39189954,54123564,73745529,99222903, 131936520,173504485] |