# A025031 (b-file synthesized from sequence entry) 0 1 1 32 2 675 3 11830 4 186641 5 2752932 6 38765455 7 527869010 8 7009691181 9 91304772832 10 1171464693035 11 14850954198990 12 186462962442121 13 2322930268904732 14 28754646814361415 15 354082225170989770