# 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