1,2

Numbers of form A001358(i)^j;

m>1 is a term iff A067029(m)=A071178(m) and (A001221(m)=2 or A067029(m) is even).

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

{1} UNION {A001358 semiprimes} UNION {A074985 squares of semiprimes} UNION {cubes of semiprimes} UNION {4th powers of semiprimes} UNION ... - Jonathan Vos Post (jvospost3(AT)gmail.com), Sep 06 2006

Semiprime analogue of A000961 = prime powers.

Cf. A000961, A001358, A074985, A085156.

Sequence in context: A123249 A010428 A028260 this_sequence A063762 A001358 A108764

Adjacent sequences: A085152 A085153 A085154 this_sequence A085156 A085157 A085158

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 21 2003