# A006690 (b-file synthesized from sequence entry)
1 1
2 56
3 7965
4 2128064
5 914929500
6 576689214816
7 500750172337212
8 572879126392178688
9 835007874759393878655
10 1510492370204314777345000
11 3320470273536658970739763334
12 8718034433102107344888781813632
13 26945647825926481227016730431025962
14 96843697086370972449408988324175689680