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Search: id:A157486
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| A157486 |
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Numbers n such that n-+1 are divisible by exactly 6 primes, counted with multiplicity. |
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+0
3
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| 1889, 3079, 4591, 5023, 6175, 6641, 7649, 9881, 10961, 11501, 11935, 12689, 13751, 14417, 15499, 15713, 16687, 18017, 18089, 18271, 19169, 19249, 19889, 19951
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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q=6; lst={}; Do[If[Plus@@Last/@FactorInteger[n-1]==q&&Plus@@Last/@FactorInteger[n+1]==q, AppendTo[lst, n]], {n, 9!}]; lst
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CROSSREFS
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Cf. A124936, A014612, A157483, A157484, A157485
Sequence in context: A072494 A029564 A106764 this_sequence A086476 A151721 A151773
Adjacent sequences: A157483 A157484 A157485 this_sequence A157487 A157488 A157489
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Mar 01 2009
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