# A157320 (b-file synthesized from sequence entry) 0 1 1 6 2 6 3 8 4 18 5 8 6 10 7 36 8 36 9 10 10 12 11 60 12 96 13 60 14 12 15 14 16 90 17 200 18 200 19 90 20 14 21 16 22 126 23 360 24 500 25 360 26 126 27 16 28 18 29 168 30 588 31 1050 32 1050 33 588 34 168 35 18 36 20 37 216 38 896 39 1960 40 2520 41 1960 42 896 43 216 44 20 45 22 46 270 47 1296 48 3360 49 5292 50 5292 51 3360 52 1296 53 270 54 22 55 24 56 330