# A262067 (b-file synthesized from sequence entry) 1 2 2 4 3 26 4 240 5 2882 6 42560 7 745418 8 15097600 9 347066882 10 8926258176 11 253930611002 12 7916100448256 13 268352394448322 14 9828088361009152 15 386707997366768618 16 16268790735900180480 17 728714136550643404802 18 34624041592426892361728