# A052263 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 1 6 240 7 62720 8 23224320 9 13440516096 10 12754259804160 11 20377681883299840 12 55671587500342640640 13 262483693581093123915776 14 2147534811240814766425374720 15 30585643102219392981931508367360