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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A138814 Divisors of 4064 (half the 4th perfect number).

Original entry on oeis.org

1, 2, 4, 8, 16, 32, 127, 254, 508, 1016, 2032, 4064
Offset: 1

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Author

Omar E. Pol, Mar 31 2008

Keywords

Comments

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

Perfect number divided by 2: A133028.
Cf. A000043, A000079, A000396, A000668, A090748, A134708, A135654, A138824.

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