A355014 -id:A355014 - cp's OEIS frontend

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

Michael De Vlieger, Jun 15 2022

nonn

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.

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

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

A355013 Index of A355012(n) in A090252.

Original entry on oeis.org

5, 7, 11, 14, 23, 31, 32, 60, 95, 96, 119, 120, 127, 128, 132, 191, 244, 263, 264, 383, 388, 480, 484, 488, 511, 512, 571, 776, 960, 968, 975, 976, 980, 1056, 1535, 1536, 1552, 1556, 1919, 1920, 2112, 2128, 2287, 3103, 3104, 3844, 3848, 3872, 3875, 3904, 3920

Offset: 1

Michael De Vlieger, Jun 15 2022

nonn

Michael De Vlieger, Table of n, a(n) for n = 1..1009

Cf. A090252, A246547, A354164, A355012, A355014.

Position[Import["https://oeis.org/A090252/b090252.txt", "Data"][[1 ;; 4000, -1]], _?(CompositeQ[#] && PrimePowerQ[#] &)][[All, 1]]

cp's OEIS Frontend

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

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