# A020112 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 6 5 25 6 131 7 843 8 6275 9 52989 10 500443 11 5226842 12 59818301 13 744405516 14 10008118595 15 144561713038 16 2232675345795 17 36715105686391 18 640474621418149 19 11813198572823623 20 229701083360459335 21 4696111037591613053