# A000347 (b-file synthesized from sequence entry) 4 1 5 5 6 24 7 84 8 251 9 653 10 1543 11 3341 12 6763 13 12879 14 23446 15 40883 16 68757 17 111976 18 177358 19 273926 20 413784 21 612430 22 889959 23 1271709 24 1789841 25 2483779 26 3402623 27 4605954 28 6166614 29 8171174 30 10724604 31 13950011 32 17994136 33 23029141 34 29255902 35 36908235 36 46257694 37 57616522 38 71344257 39 87853381 40 107612397