n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 11 |
5 | 30 |
6 | 141 |
7 | 472 |
8 | 2165 |
9 | 8302 |
10 | 38613 |
11 | 163144 |
12 | 780953 |
13 | 3554402 |
14 | 17611557 |
15 | 85145196 |
16 | 437376337 |
17 | 2225425454 |
18 | 11847704869 |
19 | 63032490312 |
20 | 347377407169 |
21 | 1923189664970 |
22 | 10955002251365 |
23 | 62881123205556 |
24 | 369621186243777 |
25 | 2193173759204902 |
26 | 13281809346518213 |
[0,0,1,2,11,30,141,472,2165,8302,38613,163144, 780953,3554402,17611557,85145196,437376337, 2225425454,11847704869,63032490312,347377407169, 1923189664970,10955002251365,62881123205556, 369621186243777,2193173759204902, 13281809346518213] |