# A014585 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 4 4 23 5 86 6 397 7 1584 8 6820 9 28002 10 117852 11 488824 12 2043133 13 8502298 14 35463855 15 147729456 16 615817511 17 2566065066 18 10694840588 19 44568760860 20 185743671308 21 774073998864 22 3225960662493 23 13444082934608