n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 3 |
3 | 4 |
4 | 26 |
5 | 80 |
6 | 387 |
7 | 1596 |
8 | 7518 |
9 | 34656 |
10 | 167310 |
11 | 813384 |
12 | 4040212 |
13 | 20285408 |
14 | 103195235 |
15 | 530042604 |
16 | 2748206006 |
17 | 14362312640 |
18 | 75609109594 |
19 | 400620871608 |
20 | 2135307326508 |
21 | 11442213676512 |
22 | 61615122713550 |
23 | 333282537518040 |
24 | 1810222600024044 |
25 | 9869776566646080 |
26 | 54002852920884540 |
27 | 296449512451881360 |
[1,0,3,4,26,80,387,1596,7518,34656,167310,813384, 4040212,20285408,103195235,530042604,2748206006, 14362312640,75609109594,400620871608, 2135307326508,11442213676512,61615122713550, 333282537518040,1810222600024044,9869776566646080, 54002852920884540,296449512451881360] |