# A013041 (b-file synthesized from sequence entry) 0 1 1 4 2 32 3 544 4 17536 5 997504 6 91956224 7 12588279552 8 2388796493824 9 598131709419520 10 190679121272193024 11 75328224099389177856 12 36099809995192945868800 13 20626251224635998952554496