# A234252 (b-file synthesized from sequence entry)
1 -1
2 1
3 0
4 23
5 112
6 2637
7 28928
8 705259
9 12021504
10 337390073
11 7752749056
12 252186614847
13 7261683740672
14 271082082053317
15 9359536638984192
16 396049017137512403
17 15920162462882529280
18 754792662169555947633
19 34587513064809080815616
20 1818644980834260579498343