# A121547 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 0 4 4 5 4 6 0 7 10 8 20 9 10 10 0 11 20 12 60 13 60 14 20 15 0 16 35 17 140 18 210 19 140 20 35 21 0 22 56 23 280 24 560 25 560 26 280 27 56 28 0 29 84 30 504 31 1260 32 1680 33 1260 34 504 35 84 36 0 37 120 38 840 39 2520 40 4200 41 4200 42 2520 43 840 44 120 45 0 46 165 47 1320 48 4620 49 9240 50 11550 51 9240 52 4620 53 1320 54 165 55 0 56 220 57 1980 58 7920 59 18480 60 27720 61 27720 62 18480 63 7920 64 1980 65 220