# A134399 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 2 6 1 7 3 8 6 9 3 10 1 11 4 12 12 13 12 14 4 15 1 16 5 17 20 18 30 19 20 20 5 21 1 22 6 23 30 24 60 25 60 26 30 27 6 28 1 29 7 30 42 31 105 32 140 33 105 34 42 35 7 36 1 37 8 38 56 39 168 40 280 41 280 42 168 43 56 44 8 45 1 46 9 47 72 48 252 49 504 50 630 51 504 52 252 53 72 54 9