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Search: id:A101936
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| A101936 |
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Numbers n with omega(n) = omega of 3 nearest larger and 3 nearest smaller neighbors. |
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+0
1
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| 144, 145, 215, 216, 326, 2305, 10283, 16685, 19055, 20215, 21198, 25782, 33335, 35121, 35167, 35205, 39696, 39697, 40272, 41393, 41783, 42345, 42413, 44363, 44364, 44365, 48922, 48923, 48924, 48925, 53737, 54352, 54353, 56017, 56018
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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10283 is in the sequence because 10280, 10281, 10282, 10283, 10284, 10285, 10286 all have the same number of unique prime factors (3).
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MATHEMATICA
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For[i=2, i<100000, If[Length[FactorInteger[i-3]]==Length[FactorInteger[i-2]]==Length[FactorInteger[i-1]]==Length[FactorInteger[i]]==Length[FactorInteger[i+1]]==Length[FactorInteger[i+2]]==Length[FactorInteger[i+3]], Print[i]]; i++ ]
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CROSSREFS
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Cf. A001221, A101932, A101932.
Sequence in context: A056628 A093769 A124512 this_sequence A044868 A085426 A034289
Adjacent sequences: A101933 A101934 A101935 this_sequence A101937 A101938 A101939
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KEYWORD
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easy,nonn
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AUTHOR
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N. Fernandez (primeness(AT)borve.org), Dec 21 2004
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