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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A192327 a(n) = prime(n) mod 2*n. 1
0, 3, 5, 7, 1, 1, 3, 3, 5, 9, 9, 13, 15, 15, 17, 21, 25, 25, 29, 31, 31, 35, 37, 41, 47, 49, 49, 51, 51, 53, 3, 3, 5, 3, 9, 7, 9, 11, 11, 13, 15, 13, 19, 17, 17, 15, 23, 31, 31, 29, 29, 31, 29, 35, 37, 39, 41, 39, 41, 41, 39, 45, 55, 55, 53, 53, 63, 65, 71, 69, 69, 71, 75, 77, 79, 79 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Michel Marcus, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A000040(n) mod (2*n).

EXAMPLE

a(1) = prime(1) mod even(1) = 2 mod 2 = 0.

a(5) = prime(5) mod even(5) = 11 mod 10 = 1.

MAPLE

A192327 := proc(n) modp(ithprime(n), 2*n) ; end proc:

seq(A192327(n), n=1..80) ; # R. J. Mathar, Jul 11 2011

MATHEMATICA

Table[Mod[Prime[n], 2n], {n, 50}] (* Alonso del Arte, Jun 29 2011 *)

PROG

(MATLAB) % n = number of computed terms of sequence

for i=1:n,

    a(i) = mod(prime(i), even(i)) ;

end

(PARI) a(n)=prime(n)%(2*n) \\ Charles R Greathouse IV, Jun 29 2011

(MAGMA) A192327:=func< n | NthPrime(n) mod 2*n >; [ A192327(n): n in [1..80] ]; // Klaus Brockhaus, Jul 10 2011

CROSSREFS

Cf. A004648.

Sequence in context: A031100 A031057 A133069 * A266295 A172049 A021032

Adjacent sequences:  A192324 A192325 A192326 * A192328 A192329 A192330

KEYWORD

nonn,easy

AUTHOR

Pasi Airikka, Jun 28 2011

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 October 23 10:14 EDT 2019. Contains 328345 sequences. (Running on oeis4.)