# A061928 (b-file synthesized from sequence entry) 1 6 2 12 3 12 4 20 5 30 6 20 7 30 8 60 9 60 10 30 11 42 12 105 13 140 14 105 15 42 16 56 17 168 18 280 19 280 20 168 21 56 22 72 23 252 24 504 25 630 26 504 27 252 28 72 29 90 30 360 31 840 32 1260 33 1260 34 840 35 360 36 90 37 110 38 495 39 1320 40 2310 41 2772 42 2310 43 1320 44 495 45 110 46 132 47 660 48 1980 49 3960 50 5544 51 5544 52 3960