# A367885 (b-file synthesized from sequence entry) 0 1 1 0 2 4 3 12 4 128 5 1040 6 12672 7 161728 8 2481152 9 41806080 10 791613440 11 16399944704 12 371591995392 13 9110211874816 14 240670782291968 15 6810264853463040 16 205583847590985728 17 6593508525460226048 18 223913466256013918208 19 8026367531323488993280