A299117 Sorted terms of A277781.

4, 8, 9, 16, 18, 24, 25, 27, 32, 36, 40, 48, 49, 50, 54, 56, 64, 72, 75, 80, 81, 88, 96, 98, 100, 104, 108, 112, 120, 121, 125, 128, 135, 136, 144, 147, 152, 160, 162, 168, 169, 176, 180, 184, 189, 192, 196, 200, 208, 216, 224, 225, 232, 240, 242, 243, 245

Offset: 1

Author

Peter Kagey, Feb 02 2018

Keywords

• nonn

Comments

It appears that all of these numbers are nonsquarefree (i.e., this sequence is a subsequence of A013929).

This sequence is to A277781 what A013929 is to A072905. That is, A277781 is a bijection from the positive integers to this sequence.

Links

• Peter Kagey, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A013929, A072905, A277781.

Programs

Mathematica

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 *)