# A138275 (b-file synthesized from sequence entry) 0 1 1 2 2 18 3 268 4 5320 5 129474 6 3700550 7 121016160 8 4448701704 9 181463572394 10 8130511993010 11 396880976034092 12 20963000461338000 13 1191187898025406514 14 72455444438093714542 15 4697146562744837487104 16 323299667265950287087968