A355012 Prime powers (p^k, k >= 2) in A090252 in order of appearance.

4, 9, 8, 25, 16, 27, 49, 121, 32, 169, 125, 289, 81, 361, 529, 64, 841, 343, 961, 128, 1369, 1681, 1849, 2209, 243, 2809, 3721, 4489, 5041, 5329, 1331, 6241, 6889, 3481, 256, 10609, 11449, 11881, 625, 12769, 7921, 9409, 10201, 2197, 26569, 32041, 32761, 16129

Offset: 1

Author

Michael De Vlieger, Jun 15 2022

Keywords

• nonn

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..1009
• Michael De Vlieger, Annotated log-log scatterplot of A090252(n), n = 1..2^12, labeling primes in red, squarefree semiprimes in green, highlighting composite prime powers in gold and labeling them in boldface.

Crossrefs

Cf. A090252, A246547, A354165, A355013, A355014.

Programs

Mathematica

Select[Import["https://oeis.org/A090252/b090252.txt", "Data"][[1 ;; 4000, -1]], CompositeQ[#] && PrimePowerQ[#] &]