A188484 - OEIS

%I #23 May 18 2020 06:16:31

%S 98,2116,4232,49928,80656,140450,550564,729632,1667138,2666689,

%T 8853632,9210632,12380288,15038884,37810208,57365476,108103808,

%U 155725952,197686728,247397768,257859364,327782408,398353538,544236032,775864832

%N Numbers n (other than powers of 2) such that abs(abundance(n)) is an odd square.

%C Superset of Kravitz conjecture counterexamples (A188486). Abundances of these numbers are A188487.

%H Giovanni Resta, <a href="/A188484/b188484.txt">Table of n, a(n) for n = 1..226</a> (terms < 10^24, first 36 terms from Donovan Johnson)

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/KravitzConjecture.html">Kravitz Conjecture</a>

%Y Cf. A188486, A188487.

%K nonn,hard

%O 1,1

%A _Eric W. Weisstein_, Apr 01 2011

%E a(17)-a(25) from _D. S. McNeil_, Apr 02 2011