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A099357
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From P-positions in a certain game.
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2
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0, 2, 5, 7, 18, 33, 51, 53, 75, 77, 103, 105, 135, 137, 171, 174, 176, 218, 220, 266, 268, 318, 320, 374, 376, 434, 436, 498, 500, 567, 637, 639, 713, 715, 793, 795, 877, 879, 965, 967, 1057, 1059, 1153, 1155, 1253, 1255, 1358, 1465, 1575, 1577
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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MAPLE
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a:=proc(n) option remember: local j, t: if(n=0)then return 0: else t:=a(n-1)+1: for j from 0 to n-1 do if(t=b(j))then return t+1: elif(t<b(j))then break: fi: od: return t: fi: end:
b:=proc(n) option remember: if(n=0)then return 0: else return b(n-1) + (-1)^a(n-1)*a(n-1) + a(n) + 1: fi: end:
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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