# A056238 (b-file synthesized from sequence entry) 1 6 2 252 3 272 4 858 5 2772 6 4004 7 6006 8 289982 9 2370732 10 2629262 11 6039306 12 27999972 13 28233282 14 2704884072 15 20278187202 16 20591819502 17 2592587852952 18 2936231326392 19 21809166190812 20 27237788773272 21 229145919541922