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!)
A329897 Numbers k for which the 2-adic and 3-adic valuations of A025487(k) are equal, where A025487(k) is the k-th number which is a product of primorial numbers. 9
1, 4, 9, 11, 20, 22, 23, 38, 41, 43, 44, 54, 69, 72, 73, 77, 79, 93, 110, 114, 118, 123, 124, 128, 129, 131, 147, 154, 181, 186, 190, 191, 199, 201, 208, 209, 212, 232, 242, 245, 246, 272, 279, 286, 294, 299, 300, 307, 310, 312, 321, 324, 327, 345, 359, 371, 374, 376, 416, 424, 425, 430, 434, 442, 446, 451, 454, 466, 469 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Numbers k for which A007814(A025487(k)) = A007949(A025487(k)).

Numbers k for which A181815(k) is odd.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..7806

CROSSREFS

Cf. A007814, A007949, A025487, A329898 (complement), A330682 (characteristic function).

Sequence A330683 sorted into ascending order.

Positions of odd terms in A181815.

Sequence in context: A206523 A312844 A181448 * A312845 A312846 A182244

Adjacent sequences:  A329894 A329895 A329896 * A329898 A329899 A329900

KEYWORD

nonn

AUTHOR

Antti Karttunen, Dec 24 2019

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 March 4 20:58 EST 2021. Contains 341811 sequences. (Running on oeis4.)