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A085156 Powers of primes or of semiprimes. 4
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 43, 46, 47, 49, 51, 53, 55, 57, 58, 59, 61, 62, 64, 65, 67, 69, 71, 73, 74, 77, 79, 81, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 100, 101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Union of A000961 and A085155;

m is a term iff A067029(m)=A071178(m) and A001221(m)<=2.

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

PROG

(PARI) is(n)=my(f=factor(n)[, 2]); #f<2 || (#f==2 && f[1]==f[2]) \\ Charles R Greathouse IV, Oct 19 2015

CROSSREFS

Sequence in context: A303554 A325328 A316521 * A102466 A322547 A325202

Adjacent sequences:  A085153 A085154 A085155 * A085157 A085158 A085159

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 21 2003

STATUS

approved

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Last modified February 23 15:24 EST 2020. Contains 332167 sequences. (Running on oeis4.)