# A091429 (b-file synthesized from sequence entry) 0 1 1 26 2 1128 3 68592 4 5368704 5 514149120 6 58253091840 7 7623288207360 8 1131761338122240 9 187970402507489280 10 34537682442564403200 11 6956566802152095744000 12 1524349874113331960217600