# A343687 (b-file synthesized from sequence entry)
0 1
1 5
2 51
3 782
4 15992
5 408814
6 12541010
7 448834728
8 18358297416
9 844755218400
10 43190363326992
11 2429044756967520
12 149029669269441456
13 9905401062535389072
14 709016063545908259248
15 54375505616232613595904
16 4448148376192382963462400
17 386619861956492109750650496
18 35580548688887294090357622912