# A218683 (b-file synthesized from sequence entry) 0 1 1 1 2 6 3 69 4 1432 5 52065 6 3202176 7 324172597 8 53099867136 9 13888279032129 10 5736880791449920 11 3710252136325373661 12 3729910949734728414624 13 5792791811385586637686849 14 13826260704559808415109532256 15 50488064853691920270244556417445