# A027248 (b-file synthesized from sequence entry) 1 1 2 6 3 29 4 156 5 741 6 3958 7 19233 8 103340 9 513829 10 2782642 11 14111035 12 76987001 13 396866211 14 2179190558 15 11387537287 16 62869497136 17 332264796115 18 1842788400972 19 9831563838105 20 54737178645869 21 294362713929617 22 1644215891925732 23 8902034364734719 24 49863044050919951