# A049175 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 11 5 43 6 181 7 799 8 3641 9 17013 10 81069 11 392427 12 1924363 13 9539431 14 47726001 15 240671423 16 1222026809 17 6242470529 18 32058889049 19 165425745315 20 857247711523 21 4459393489451 22 23278491380285 23 121901175460639 24 640201825131969