n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 7 |
6 | 23 |
7 | 78 |
8 | 311 |
9 | 1297 |
10 | 6200 |
11 | 31747 |
12 | 178703 |
13 | 1070388 |
14 | 6842898 |
15 | 46158435 |
16 | 327718768 |
17 | 2437732593 |
18 | 18948528721 |
19 | 153498234770 |
20 | 1293122838953 |
21 | 11306474635818 |
22 | 102425551817363 |
23 | 959826751122645 |
24 | 9290811889272509 |
25 | 92771812680385087 |
26 | 954447072777977556 |
[0,0,1,2,7,23,78,311,1297,6200,31747,178703, 1070388,6842898,46158435,327718768,2437732593, 18948528721,153498234770,1293122838953, 11306474635818,102425551817363,959826751122645, 9290811889272509,92771812680385087, 954447072777977556] |