# A123519 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 1 4 6 5 4 6 1 7 12 8 20 9 8 10 1 11 20 12 60 13 56 14 16 15 1 16 30 17 140 18 224 19 144 20 32 21 1 22 42 23 280 24 672 25 720 26 352 27 64 28 1 29 56 30 504 31 1680 32 2640 33 2112 34 832 35 128 36 1 37 72 38 840 39 3696 40 7920 41 9152 42 5824 43 1920 44 256 45 1 46 90 47 1320 48 7392 49 20592 50 32032 51 29120 52 15360 53 4352 54 512 55 1 56 110