# A046907 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 7 5 31 6 184 7 1351 8 12524 9 146468 10 2177570 11 41374407 12 1008220289 13 31559446774 14 1269310589336 15 65562045668340 16 4345161435996517