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!)
A175508 If p is the product of k1-th prime, k2-th prime,..,kr-th prime then set a(n)=n-k1*k2*..*kr, if p is the k-th prime then set=n-k, a(1)=1 by convention. 7
1, 1, 1, 3, 2, 4, 3, 7, 5, 7, 6, 10, 7, 10, 9, 15, 10, 14, 11, 17, 13, 17, 14, 22, 16, 20, 19, 24, 19, 24, 20, 31, 23, 26, 23, 32, 25, 30, 27, 37, 28, 34, 29, 39, 33, 37, 32, 46, 33, 41, 37, 46, 37, 46, 40, 52, 41, 48, 42, 54, 43, 51, 47, 63, 47, 56, 48, 61, 51, 58, 51, 68, 52, 62 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..74.

FORMULA

a(n)=A000027(n)-A003963(n).

CROSSREFS

Cf. A003963.

Sequence in context: A023869 A024596 A262610 * A065375 A070961 A243291

Adjacent sequences:  A175505 A175506 A175507 * A175509 A175510 A175511

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Jun 03 2010

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 November 28 23:48 EST 2021. Contains 349415 sequences. (Running on oeis4.)