# A075734 (b-file synthesized from sequence entry) 1 1 2 8 3 55 4 377 5 610 6 10946 7 17711 8 121393 9 3524578 10 5702887 11 9227465 12 39088169 13 63245986 14 1836311903 15 20365011074 16 139583862445 17 365435296162 18 591286729879 19 4052739537881 20 17167680177565 21 117669030460994