

A163813


Start with A000961 = prime powers p^k (p prime, k >= 0): 1, 2, 3, 4, 5, 7, 8, 9, 11, 13, 16, 17, 19, 23, 25, ... Then for each m >= 1 swap the mth prime (k=1) with the mth proper prime power (k>1).


3



1, 4, 8, 2, 9, 16, 3, 5, 25, 27, 7, 32, 49, 64, 11, 13, 81, 121, 17, 125, 128, 169, 243, 19, 256, 289, 343, 23, 361, 512, 529, 625, 29, 729, 841, 961, 1024, 1331, 1369, 1681, 1849, 31, 37, 2048, 41, 2187, 2197, 2209, 2401, 2809, 3125, 3481, 3721, 43, 4096, 4489, 4913, 5041, 5329, 6241, 6561, 6859, 6889, 7921, 8192, 9409
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OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

First prime, 2, is swapped with first prime power, 4.
Second prime, 3, is swapped with 2nd prime power, 8.
Third prime, 5, is swapped with 3rd prime power, 9.


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



