# A013344 (b-file synthesized from sequence entry)
0 0
1 2
2 8
3 226
4 15504
5 1188706
6 148306520
7 26128271170
8 5977691158048
9 1757745580960834
10 644493123719650472
11 287811224662750272034
12 153933334239209991266992
13 97140471618560380314609826