# A024266 (b-file synthesized from sequence entry) 0 0 1 1 2 4 3 184 4 8256 5 791552 6 99776000 7 18222789632 8 4310149906432 9 1310908146057216 10 493677023283642368 11 226366154168309645312 12 123958777998669625950208 13 79952265836019615061245952