# A103328 (b-file synthesized from sequence entry) 0 0 1 2 2 0 3 4 4 4 5 0 6 6 7 20 8 6 9 0 10 8 11 56 12 56 13 8 14 0 15 10 16 120 17 252 18 120 19 10 20 0 21 12 22 220 23 792 24 792 25 220 26 12 27 0 28 14 29 364 30 2002 31 3432 32 2002 33 364 34 14 35 0 36 16 37 560 38 4368 39 11440 40 11440 41 4368 42 560 43 16 44 0 45 18 46 816 47 8568 48 31824 49 48620 50 31824 51 8568 52 816 53 18 54 0 55 20 56 1140 57 15504