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A108118
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Integers not divisible by 3 or 4.
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1
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1, 2, 5, 7, 10, 11, 13, 14, 17, 19, 22, 23, 25, 26, 29, 31, 34, 35, 37, 38, 41, 43, 46, 47, 49, 50, 53, 55, 58, 59, 61, 62, 65, 67, 70, 71, 73, 74, 77, 79, 82, 83, 85, 86, 89, 91, 94, 95, 97, 98, 101, 103, 106, 107, 109, 110, 113, 115, 118, 119, 121, 122, 125, 127, 130, 131
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Or, numbers congruent to 1, 2, 5, 7, 10 or 11 mod 12 (cf. A007310). Expand (x+x^2+x^5+x^7+x^10+x^11)/(1-x^12) (cf. A007310). All terms, except 35 and 70, are also in A099477.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (2,-1,-1,2,-1).
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FORMULA
| G.f. x*(1+x^2)^2 / ( (1+x)*(x^2-x+1)*(x-1)^2 ). - R. J. Mathar, Oct 25 2011
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MATHEMATICA
| Select[ Range[132], !IntegerQ[ #/4] && !IntegerQ[ #/3] &] (* or *) Flatten[ NestList[12 + # &, {1, 2, 5, 7, 10, 11}, 10]]
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CROSSREFS
| Cf. A007310, A099477.
Sequence in context: A086422 A046880 A142879 * A099477 A067934 A112730
Adjacent sequences: A108115 A108116 A108117 * A108119 A108120 A108121
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KEYWORD
| nonn
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Jun 04 2005
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