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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A328843 a(n) = A328841(A276086(n)). 4
1, 2, 3, 6, 9, 6, 3, 8, 9, 30, 39, 30, 7, 38, 39, 30, 219, 240, 33, 248, 249, 240, 249, 240, 247, 248, 249, 2550, 2559, 2550, 7, 8, 9, 36, 33, 36, 33, 38, 39, 210, 249, 210, 37, 248, 249, 210, 249, 2520, 243, 248, 2559, 2520, 2559, 2520, 2557, 2558, 2559, 2520, 32379, 32550, 37, 38, 39, 246, 219, 246, 243, 248, 249, 210, 249, 2520, 247 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..32768

Index entries for sequences related to primorial base

FORMULA

a(n) = A328841(A276086(n)).

a(n) = A276086(n) - A328844(n).

For all n >= 0, A257993(a(n)) = A328570(n).

PROG

(PARI)

A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };

A328841(n) = { my(p=2, r=1, s=0); while(n, s += ((!!(n%p))*r); r *= p; n = n\p; p = nextprime(1+p)); (s); };

A328843(n) = A328841(A276086(n));

CROSSREFS

Cf. A257993, A276086, A328570, A328841, A328844.

Sequence in context: A193079 A191397 A087494 * A021426 A309008 A249182

Adjacent sequences:  A328840 A328841 A328842 * A328844 A328845 A328846

KEYWORD

nonn

AUTHOR

Antti Karttunen, Oct 30 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 December 6 03:59 EST 2021. Contains 349562 sequences. (Running on oeis4.)