# A012320 (b-file synthesized from sequence entry)
0 1
1 0
2 -1
3 -6
4 -27
5 -100
6 -285
7 70
8 10857
9 138456
10 1345575
11 12246322
12 104657421
13 905107892
14 7506129995
15 67825026750
16 599458508113
17 7155160301616
18 87359515770831
19 1675741434252522
20 28468606356977333