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A115419
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Numbers having a 1 in position 3 of their binary expansion.
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6
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| One of the mystery calculator sequences: A005408, A042964, A047566, A115419, A115420, A115421.
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LINKS
| Maths Magic, Mystery Calculator.
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FORMULA
| 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
| a(1) = 8 = 1000 in binary.
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MAPLE
| a:= n-> n+7 + 8*iquo(n-1, 8):
seq (a(n), n=1..100); # Alois P. Heinz, Aug 22 2011
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CROSSREFS
| Cf. A005408, A042964, A047566, A115420, A115421.
Sequence in context: A046037 A089017 A023391 * A161639 A162788 A115842
Adjacent sequences: A115416 A115417 A115418 * A115420 A115421 A115422
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KEYWORD
| base,easy,nonn
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AUTHOR
| Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Jan 22 2006
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