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A115419
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Numbers having a 1 in position 3 of their binary expansion.
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8
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8, 9, 10, 11, 12, 13, 14, 15, 24, 25, 26, 27, 28, 29, 30, 31, 40, 41, 42, 43, 44, 45, 46, 47, 56, 57, 58, 59, 60, 61, 62, 63, 72, 73, 74, 75, 76, 77, 78, 79, 88, 89, 90, 91, 92, 93, 94, 95, 104, 105, 106, 107, 108, 109, 110, 111, 120, 121, 122, 123, 124, 125, 126, 127
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Numbers congruent to {8,9,10,11,12,13,14,15} mod 16. Numbers n such that n xor 8 = n - 8. [Brad Clardy, May 06 2013]
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LINKS
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FORMULA
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G.f.: -(x^8+x^7+x^6+x^5+x^4+x^3+x^2+x+8)*x / (-x^9+x^8+x-1). - Alois P. Heinz, Aug 22 2011
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EXAMPLE
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a(1) = 8 = 1000 in binary.
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MAPLE
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a:= n-> n+7 + 8*iquo(n-1, 8):
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PROG
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CROSSREFS
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KEYWORD
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base,easy,nonn,changed
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AUTHOR
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STATUS
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approved
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