# A134872 (b-file synthesized from sequence entry) 1 6 2 28 3 248 4 2032 5 262112 6 8388544 7 67108736 8 549755813632 9 1180591620717411302912 10 633825300114114700748351601664 11 332306998946228968225951765070084096 12 696898287454081973172991196020261297057792