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A125218 Numbers having at least two representations as 4*x*y-x-y with 1<=x<=y. 4

%I

%S 26,41,47,56,68,71,74,86,89,96,101,107,110,116,128,131,140,146,152,

%T 155,161,166,173,176,182,185,191,194,201,206,209,215,221,224,236,239,

%U 242,250

%N Numbers having at least two representations as 4*x*y-x-y with 1<=x<=y.

%C A125203(a(n)) > 1.

%C A124934 is the union of this sequence and A125217.

%H Reinhard Zumkeller, <a href="/A125218/b125218.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (findIndices)

%o a125218 n = a125218_list !! (n-1)

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

%o -- _Reinhard Zumkeller_, Jan 02 2013

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Nov 24 2006

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Last modified January 27 12:50 EST 2022. Contains 350607 sequences. (Running on oeis4.)