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A125218 Numbers having at least two representations as 4*x*y-x-y with 1<=x<=y. 4
26, 41, 47, 56, 68, 71, 74, 86, 89, 96, 101, 107, 110, 116, 128, 131, 140, 146, 152, 155, 161, 166, 173, 176, 182, 185, 191, 194, 201, 206, 209, 215, 221, 224, 236, 239, 242, 250 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A125203(a(n)) > 1.

A124934 is the union of this sequence and A125217.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

import Data.List (findIndices)

a125218 n = a125218_list !! (n-1)

a125218_list = map (+ 1) $ findIndices (> 1) a125203_list

-- Reinhard Zumkeller, Jan 02 2013

CROSSREFS

Sequence in context: A075288 A320255 A348286 * A174990 A285513 A138727

Adjacent sequences:  A125215 A125216 A125217 * A125219 A125220 A125221

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 24 2006

STATUS

approved

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Last modified December 5 17:28 EST 2021. Contains 349557 sequences. (Running on oeis4.)