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

1,1

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.

Mathematica

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

Crossrefs

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

Sequence in context: A217579 A118585 A067666 * A280286 A268597 A373319

Adjacent sequences: A355009 A355010 A355011 * A355013 A355014 A355015

Keyword

nonn

Author

Michael De Vlieger, Jun 15 2022

Status

approved