# A053774 (b-file synthesized from sequence entry) 1 1 2 3 3 57 4 1233 5 75393 6 339089409 7 2607120373761 8 42451338836860929 9 3767776947041641791489 10 355742034243147691726340097 11 91926159597577085028716636536833 12 97320453584330647458564330111836880897 13 145554614131872292109665186286397182040866817