# A048432 (b-file synthesized from sequence entry) 1 4 2 141 3 323 4 323 5 667766 6 1175711 7 42599524 8 66411466 9 158191851 10 15980308951 11 432647746234 12 1516290926151 13 44553611635544 14 65937388373956 15 279311626113972 16 2380289449820832 17 2380289449820832 18 705000799997000507