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%I #17 Nov 25 2019 01:09:53
%S 4,8,9,16,18,24,25,27,32,36,40,48,49,50,54,56,64,72,75,80,81,88,96,98,
%T 100,104,108,112,120,121,125,128,135,136,144,147,152,160,162,168,169,
%U 176,180,184,189,192,196,200,208,216,224,225,232,240,242,243,245
%N Sorted terms of A277781.
%C It appears that all of these numbers are nonsquarefree (i.e., this sequence is a subsequence of A013929).
%C This sequence is to A277781 what A013929 is to A072905. That is, A277781 is a bijection from the positive integers to this sequence.
%H Peter Kagey, <a href="/A299117/b299117.txt">Table of n, a(n) for n = 1..1000</a>
%t With[{nn = 57}, Take[#, nn] &@ Sort@ Table[SelectFirst[n + Range[7 + n^2], AnyTrue[Power[#, 1/3] & /@ {n #, n #^2}, IntegerQ] &], {n, 8 nn}]] (* _Michael De Vlieger_, Feb 03 2018 *)
%Y Cf. A013929, A072905, A277781.
%K nonn
%O 1,1
%A _Peter Kagey_, Feb 02 2018
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