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

1,1

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

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 *)

Crossrefs

Cf. A013929, A072905, A277781.

Sequence in context: A034024 A370354 A375403 * A339462 A140269 A339744

Adjacent sequences: A299114 A299115 A299116 * A299118 A299119 A299120

Keyword

nonn

Author

Peter Kagey, Feb 02 2018

Status

approved