login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A157524 a(n) = A140783(n+4)/9. 1
1, 1, 2, 2, 3, 3, 3, 3, 5, 5, 5, 7, 6, 6, 7, 8, 6, 9, 11, 10, 9, 10, 11, 11, 11, 14, 13, 15, 21, 22, 19, 20, 19, 20, 19, 20, 21, 18, 21, 23, 20, 22, 23, 27, 29, 27, 33, 30, 27, 29, 31, 32, 36, 38, 35, 35, 39, 37, 35, 34, 41, 43, 46, 47, 42, 40, 39, 42, 46, 46, 53, 52, 45, 46, 50, 50, 56, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..77.

MAPLE

A091137 := proc(n) local a, p ; a := 1 ; p := 2 ; while floor(n/(p-1)) > 0 do a := a*p^floor(n/(p-1)) ; p := nextprime(p) ; od: RETURN(a) ; end:

A140783 := proc(n) add(i, i=convert(A091137(n), base, 10)) ; end:

A157524 := proc(n) A140783(n+4)/9; end: seq(A157524(n), n=0..120) ; # R. J. Mathar, Apr 10 2009

CROSSREFS

Sequence in context: A160903 A124229 A055377 * A239496 A299962 A128586

Adjacent sequences:  A157521 A157522 A157523 * A157525 A157526 A157527

KEYWORD

nonn,base

AUTHOR

Paul Curtz, Mar 02 2009

EXTENSIONS

Extended by R. J. Mathar, Apr 10 2009

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 16 01:32 EST 2019. Contains 330013 sequences. (Running on oeis4.)