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A121537
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If n appears then 2n, 3n and 4n do not.
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0
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1, 5, 6, 7, 8, 9, 11, 13, 17, 19, 23, 25, 29, 30, 31, 35, 37, 40, 41, 42, 43, 45, 47, 48, 49, 53, 54, 55, 56, 59, 61, 63, 64, 65, 66, 67, 71, 72, 73, 77, 78, 79, 81, 83, 85, 88, 89, 91, 95, 97, 99, 101, 102, 103, 104, 107, 109, 113, 114, 115, 117, 119, 121, 125, 127, 131
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| A003159 If n appears then 2n does not. A036668 If n appears then 2n and 3n do not.
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MATHEMATICA
| s={1}; Do[If[FreeQ[s, n/2]&&FreeQ[s, n/3]&&FreeQ[s, n/4], AppendTo[s, n]], {n, 2, 150}]; s
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CROSSREFS
| Cf. A003159, A036668.
Sequence in context: A003667 A138469 A089362 * A047577 A174138 A108401
Adjacent sequences: A121534 A121535 A121536 * A121538 A121539 A121540
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KEYWORD
| nonn
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Aug 06 2006
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