# A227396 (b-file synthesized from sequence entry) 0 1 1 -1 2 2 3 -2 4 3 5 3 6 -3 7 4 8 6 9 4 10 -4 11 5 12 10 13 10 14 5 15 -5 16 6 17 15 18 20 19 15 20 6 21 -6 22 7 23 21 24 35 25 35 26 21 27 7 28 -7 29 8 30 28 31 56 32 70 33 56 34 28 35 8 36 -8 37 9 38 36 39 84 40 126 41 126 42 84 43 36 44 9 45 -9 46 10 47 45 48 120 49 210 50 252 51 210 52 120 53 45 54 10 55 -10