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A098871
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Sums of distinct powers of 4 plus 1.
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1
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1, 2, 5, 6, 17, 18, 21, 22, 65, 66, 69, 70, 81, 82, 85, 86, 257, 258, 261, 262, 273, 274, 277, 278, 321, 322, 325, 326, 337, 338, 341, 342, 1025, 1026, 1029, 1030, 1041, 1042, 1045, 1046, 1089, 1090, 1093, 1094, 1105, 1106, 1109, 1110, 1281, 1282, 1285, 1286
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OFFSET
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0,2
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LINKS
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FORMULA
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MAPLE
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a:= proc(n) local m, r, b; m, r, b:= n, 1, 1;
while m>0 do r:= r+b*irem(m, 2, 'm'); b:= b*4 od; r
end:
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MATHEMATICA
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(* first do *) Needs["DiscreteMath`Combinatorica`"]; (* then *) Take[ Sort[ Plus @@@ Subsets[ Table[4^n, {n, 0, 5}]]] + 1, 50] (* Robert G. Wilson v, Oct 23 2004 *)
Total/@Subsets[4^Range[0, 5], 10]+1//Union (* Harvey P. Dale, May 03 2019 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Tom C. Brown (tbrown(AT)sfu.ca), Oct 13 2004
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EXTENSIONS
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STATUS
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approved
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