# A010873 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 0 5 1 6 2 7 3 8 0 9 1 10 2 11 3 12 0 13 1 14 2 15 3 16 0 17 1 18 2 19 3 20 0 21 1 22 2 23 3 24 0 25 1 26 2 27 3 28 0 29 1 30 2 31 3 32 0 33 1 34 2 35 3 36 0 37 1 38 2 39 3 40 0 41 1 42 2 43 3 44 0 45 1 46 2 47 3 48 0 49 1 50 2 51 3 52 0 53 1 54 2 55 3 56 0 57 1 58 2 59 3 60 0 61 1 62 2 63 3 64 0 65 1 66 2 67 3 68 0 69 1 70 2 71 3 72 0 73 1 74 2 75 3 76 0 77 1 78 2 79 3 80 0