# A081679 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 16 4 199 5 1756 6 13231 7 91876 8 608959 9 3922396 10 24798511 11 154802836 12 957674719 13 5885660236 14 35993747791 15 219289723396 16 1332092132479 17 8073205753276 18 48838076777071 19 295005107805556 20 1779844007102239 21 10727852491849516 22 64609947250462351 23 388869415622361316