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!)
A286613 a(n) = A046523(A244154(n)). 4
1, 2, 2, 2, 4, 8, 2, 6, 6, 2, 12, 2, 4, 6, 12, 2, 2, 2, 12, 32, 6, 2, 24, 12, 2, 6, 6, 2, 12, 12, 2, 6, 4, 12, 6, 12, 6, 2, 30, 6, 72, 12, 2, 6, 120, 2, 30, 6, 6, 30, 6, 6, 24, 48, 2, 12, 60, 6, 210, 2, 2, 30, 6, 6, 6, 6, 2, 2, 60, 12, 2, 2, 6, 2, 60, 24, 6, 6, 48, 12, 6, 6, 6, 2, 6, 12, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..16383

FORMULA

a(n) = A046523(A244154(n)).

a(n) = A278224(A005940(1+n)) = A046523(A048673(A005940(1+n))).

a(n) = A285713(A054429(n)).

PROG

(PARI)

A003961(n) = my(f = factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); \\ This function from Michel Marcus

A048673(n) = (A003961(n)+1)/2;

A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); t }; \\ Modified from code of M. F. Hasler

A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); };  \\ This function from Charles R Greathouse IV, Aug 17 2011

A286613(n) = A046523(A048673(A005940(1+n)));

(Scheme) (define (A286613 n) (A046523 (A244154 n)))

CROSSREFS

Cf. A005940, A046523, A048673, A054429, A244154, A278224, A285713, A286614.

Sequence in context: A098705 A029866 A244458 * A229061 A339464 A278224

Adjacent sequences:  A286610 A286611 A286612 * A286614 A286615 A286616

KEYWORD

nonn

AUTHOR

Antti Karttunen, May 30 2017

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 September 17 16:50 EDT 2021. Contains 347487 sequences. (Running on oeis4.)