cp's OEIS Frontend

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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A138830 Bisection of imperfect numbers A132999.

Original entry on oeis.org

2, 4, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118
Offset: 1

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Author

Omar E. Pol, Apr 06 2008

Keywords

Comments

The conjectured g.f. (-x^14+x^13-x^3+x^2+2)/(x^2-2*x+1) that a correspondent suggested is wrong and fails after roughly 240 terms [R. J. Mathar, Jun 15 2009]

Crossrefs

Cf. A000396, A099057, A099058, A132999, A138829.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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