n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 15 |
6 | 46 |
7 | 151 |
8 | 570 |
9 | 2376 |
10 | 10961 |
11 | 54941 |
12 | 297220 |
13 | 1720725 |
14 | 10602541 |
15 | 69176095 |
16 | 475881437 |
17 | 3439093081 |
18 | 26026621617 |
19 | 205694058211 |
20 | 1693554793730 |
21 | 14494778231067 |
22 | 128711956613875 |
23 | 1183763037547762 |
24 | 11258075170582653 |
25 | 110558809039675629 |
26 | 1119649516271861536 |
[0,0,1,3,6,15,46,151,570,2376,10961,54941,297220, 1720725,10602541,69176095,475881437,3439093081, 26026621617,205694058211,1693554793730, 14494778231067,128711956613875,1183763037547762, 11258075170582653,110558809039675629, 1119649516271861536] |