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First member of a pair of numbers occurring in the definition of 1-happy couples.
6

%I #15 Jul 22 2020 11:37:04

%S 1,2,2,3,3,1,18,4,4,13,1,3,5,5,3,70,1,1,6,6,3,3,32,59,3,4,7,7,9,182,

%T 11,2,1,5,23,1,29718,8,8,221,2,13,7,1,1068,1,39,5,9,9,3,378,7,500,11,

%U 5,45,151,1,5604,10,10,5,2,31,5,8890182,1,7,3,776,15

%N First member of a pair of numbers occurring in the definition of 1-happy couples.

%H Reinhard Zumkeller, <a href="/A191860/b191860.txt">Table of n, a(n) for n = 1..200</a>

%H J. H. Conway, <a href="http://www.cs.uwaterloo.ca/journals/JIS/happy.html">On Happy Factorizations</a>, J. Integer Sequences, Vol. 1, 1998, #1.

%H <a href="/A007968/a007968.txt">Initial Happy Factorization Data</a>

%o (Haskell)

%o a191860 = fst . sqrtPair . a007969

%o Function sqrtPair is defined in A007968.

%o -- _Reinhard Zumkeller_, Oct 11 2015

%Y Cf. A007968, A007969, A094048 (subsequence).

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jun 18 2011

%E Wrong comment and wrong formula removed (thanks to _Wolfdieter Lang_, who pointed this out) by _Reinhard Zumkeller_, Oct 11 2015