# A216973 (b-file synthesized from sequence entry) 0 0 1 1 2 0 3 2 4 2 5 0 6 3 7 6 8 3 9 0 10 4 11 12 12 12 13 4 14 0 15 5 16 20 17 30 18 20 19 5 20 0 21 6 22 30 23 60 24 60 25 30 26 6 27 0 28 7 29 42 30 105 31 140 32 105 33 42 34 7 35 0 36 8 37 56 38 168 39 280 40 280 41 168 42 56 43 8 44 0 45 9 46 72 47 252 48 504 49 630 50 504 51 252 52 72 53 9 54 0 55 10 56 90 57 360 58 840 59 1260 60 1260 61 840 62 360 63 90 64 10 65 0