A138830 - OEIS

A138830

Bisection of imperfect numbers A132999.

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

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OFFSET

1,1

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]

LINKS

Table of n, a(n) for n=1..58.

CROSSREFS

Cf. A000396, A099057, A099058, A132999, A138829.

Sequence in context: A187978 A190193 A353737 * A122077 A029924 A125883

Adjacent sequences: A138827 A138828 A138829 * A138831 A138832 A138833

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Apr 06 2008

STATUS

approved