n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 4 |
5 | 76 |
6 | 1395 |
7 | 24950 |
8 | 427336 |
9 | 6987100 |
10 | 109761827 |
11 | 1668376886 |
12 | 24689351504 |
13 | 357467967214 |
14 | 5083309341304 |
15 | 71209097157108 |
16 | 984963603696282 |
17 | 13477371260785608 |
18 | 182698708325667710 |
19 | 2456600457435363198 |
20 | 32796863046711248526 |
[0,0,0,0,4,76,1395,24950,427336,6987100,109761827, 1668376886,24689351504,357467967214,5083309341304, 71209097157108,984963603696282,13477371260785608, 182698708325667710,2456600457435363198, 32796863046711248526] |