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A165804
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Numbers of the form i*8^j-1 (i=1..7, j >= 0).
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9
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0, 1, 2, 3, 4, 5, 6, 7, 15, 23, 31, 39, 47, 55, 63, 127, 191, 255, 319, 383, 447, 511, 1023, 1535, 2047, 2559, 3071, 3583, 4095, 8191, 12287, 16383, 20479, 24575, 28671, 32767, 65535, 98303, 131071, 163839, 196607, 229375, 262143, 524287, 786431, 1048575, 1310719, 1572863, 1835007, 2097151
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OFFSET
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1,3
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COMMENTS
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Numbers whose sum of digits in base 8 sets a new record. - Harvey P. Dale, Jan 10 2024
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LINKS
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FORMULA
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G.f.: x^2*(x^6+x^5+x^4+x^3+x^2+x+1) / ((x-1)*(8*x^7-1)). [Colin Barker, Feb 01 2013]
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MATHEMATICA
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Sort[Flatten[Table[i 8^j-1, {i, 1, 7}, {j, 0, 7}]]] (* Harvey P. Dale, Feb 03 2011 *)
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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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STATUS
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approved
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