# A028551 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 4646 4 93380 5 1059794 6 8621895 7 56103210 8 310044370 9 1510551680 10 6651075761 11 26933846630 12 101620829275 13 360788432800 14 1214753145335 15 3903008000874 16 12028224670920 17 35705261501310 18 102455800359789 19 285054726362240 20 770966832733441 21 2031593146266830