A022461 - OEIS

A022461

a(n) = prime(n+1)*prime(n+2) mod prime(n).

1, 2, 2, 3, 1, 11, 12, 2, 2, 16, 29, 24, 12, 40, 25, 48, 16, 60, 24, 16, 60, 40, 1, 7, 24, 12, 24, 12, 72, 26, 40, 48, 24, 120, 16, 72, 60, 40, 72, 48, 24, 120, 12, 24, 28, 89, 192, 24, 12, 40, 48, 24, 160, 72, 72, 48, 16, 60, 24, 24, 240, 252, 24, 12, 72, 280

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A006094(n+1) mod A000040(n). - Michel Marcus, Feb 28 2018

MATHEMATICA

Table[Mod[Prime[n + 1]Prime[n + 2], Prime[n]], {n, 1, 80}] (* Stefan Steinerberger, Apr 14 2006 *)

Mod[#[[2]]#[[3]], #[[1]]]&/@Partition[Prime[Range[70]], 3, 1] (* Harvey P. Dale, Jun 05 2023 *)

PROG

(PARI) for(n=1, 50, print1((prime(n+1)*prime(n+2)) % prime(n), ", ")) \\ G. C. Greubel, Feb 27 2018

(Magma) [NthPrime(n+1)*NthPrime(n+2) mod NthPrime(n): n in [1..50]]; // G. C. Greubel, Feb 27 2018

CROSSREFS

Cf. A006094, A072565.

Sequence in context: A220349 A273218 A173160 * A306821 A271226 A292372

Adjacent sequences: A022458 A022459 A022460 * A022462 A022463 A022464

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved