# A009613 (b-file synthesized from sequence entry)
0 0
1 2
2 16
3 392
4 21376
5 1875872
6 227105536
7 35750690432
8 7110343684096
9 1750588208886272
10 523940264885702656
11 187423773435078920192
12 78905518064423548911616
13 38568578386644134655598592