# A081687 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 20 4 542 5 8132 6 94502 7 964700 8 9138782 9 82619732 10 724180502 11 6213565580 12 52507598222 13 438786732932 14 3636161064902 15 29939329241660 16 245281233244862 17 2001531240407732 18 16280816416067702 19 132088684297864940 20 1069381010972414702 21 8642425579112444132 22 69743202133180068902