# A147287 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 25 10 41 11 113 12 265 13 1045 14 2597 15 10607 16 34895 17 213407 18 913033 19 6860785 20 33581603