A085156 Powers of primes or of semiprimes.

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

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 * A342522 A102466 A354144

Adjacent sequences: A085153 A085154 A085155 * A085157 A085158 A085159

Keyword

nonn

Author

Reinhard Zumkeller, Jun 21 2003

Status

approved