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Search: id:A138814
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| A138814 |
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Divisors of 4064 (the 4th perfect number divided by 2). |
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+0
2
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| 1, 2, 4, 8, 16, 32, 127, 254, 508, 1016, 2032, 4064
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OFFSET
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1,2
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COMMENT
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The n-th perfect number divided by 2 (A133028(n)) has 2*A090748(n) divisors, then this sequence has 12 members. First 6 members are the first 6 powers of 2 A000079. Last 6 members are multiples of 4th Mersenne prime A000668(4)=127. a(n) written in base 2 has n digit. See A138824 for the structure of this sequence.
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CROSSREFS
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Perfect number divided by 2: A133028. Cf. A000043, A000079, A000396, A000668, A090748, A134708, A135654, A138824.
Sequence in context: A076766 A035523 A078227 this_sequence A137181 A036373 A119610
Adjacent sequences: A138811 A138812 A138813 this_sequence A138815 A138816 A138817
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KEYWORD
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easy,fini,full,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Mar 31 2008
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