login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A322449 Numbers whose prime factorization contains only composite exponents. 3
1, 16, 64, 81, 256, 512, 625, 729, 1024, 1296, 2401, 4096, 5184, 6561, 10000, 11664, 14641, 15625, 16384, 19683, 20736, 28561, 32768, 38416, 40000, 41472, 46656, 50625, 59049, 65536, 82944, 83521, 104976, 117649, 130321, 153664, 160000, 186624, 194481, 234256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Differs from A117453 first at n = 13: a(13) = 5184 = 2^6 * 3^4, A117453(13) = 6561 = 3^8.

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..10000

EXAMPLE

5184 = 2^6 * 3^4 is a term because all exponents are composite numbers.

CROSSREFS

Cf. A002808, A117453, A322448.

Sequence in context: A320892 A062320 A233330 * A117453 A340588 A305242

Adjacent sequences:  A322446 A322447 A322448 * A322450 A322451 A322452

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Dec 08 2018

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 14 12:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)