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Search: id:A128974
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| A128974 |
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Numbers n such that 12n does not divide Fibonacci(12n). |
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+0
1
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| 7, 11, 13, 17, 19, 21, 22, 23, 26, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 44, 47, 49, 52, 53, 58, 59, 61, 62, 63, 65, 66, 67, 68, 69, 71, 73, 74, 76, 77, 78, 79, 82, 83, 85, 86, 87, 88, 89, 91, 93, 94, 95, 97, 99, 101, 103, 104, 105, 106, 107, 109, 111, 113, 115, 116, 117
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OFFSET
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1,1
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COMMENT
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a(n) is a complement of A072378(n) = {1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 24, 25, 27, ...} Numbers n such that 12n divides Fibonacci(12n). It appears that a(n) includes all powers p^k for prime p>5 and integer k>0.
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MATHEMATICA
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Select[ Range[400], !IntegerQ[ Fibonacci[ 12# ] / (12#) ] & ]
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CROSSREFS
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Cf. A072378 = numbers n such that 12n divides Fibonacci(12n). Cf. A023172 = numbers n such that n divides Fibonacci(n).
Sequence in context: A112090 A103487 A112588 this_sequence A005776 A161850 A007775
Adjacent sequences: A128971 A128972 A128973 this_sequence A128975 A128976 A128977
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), May 11 2007
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