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A139799 Sequence of integers n>=2 such that there is an integer k>1 with k divides n and k divides (n/k)+1. 1
2, 6, 10, 12, 14, 15, 18, 20, 22, 24, 26, 28, 30, 33, 34, 38, 42, 44, 45, 46, 50, 51, 54, 56, 58, 60, 62, 66, 69, 70, 72, 74, 76, 78, 82, 86, 87, 90, 91, 92, 94, 95, 96, 98, 102, 105, 106, 108, 110, 114, 118, 120, 122, 123, 124, 126, 130, 132, 134, 138, 140 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The first square in the sequence is 1225.

First squares are 1225, 8100, 25600, 46225. - Zak Seidov, Nov 14 2012

LINKS

Zak Seidov, Table of n, a(n) for n = 1..10000

J. Malenfant, On the Matrix-Element Expansion of a Circulant Determinant, arXiv preprint arXiv:1502.06012, 2015

CROSSREFS

Sequence in context: A175437 A133520 A099017 * A214586 A139710 A194712

Adjacent sequences:  A139796 A139797 A139798 * A139800 A139801 A139802

KEYWORD

nonn

AUTHOR

Juan Lopez Gonzalez (e44625(AT)estudiante.uam.es), Jun 14 2008

EXTENSIONS

Number 37 replaced by 38 - Zak Seidov, Nov 14 2012

STATUS

approved

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Last modified July 22 03:22 EDT 2017. Contains 289648 sequences.