A039706 - OEIS

A039706

a(n) = n-th prime modulo 8.

2, 3, 5, 7, 3, 5, 1, 3, 7, 5, 7, 5, 1, 3, 7, 5, 3, 5, 3, 7, 1, 7, 3, 1, 1, 5, 7, 3, 5, 1, 7, 3, 1, 3, 5, 7, 5, 3, 7, 5, 3, 5, 7, 1, 5, 7, 3, 7, 3, 5, 1, 7, 1, 3, 1, 7, 5, 7, 5, 1, 3, 5, 3, 7, 1, 5, 3, 1, 3, 5, 1, 7, 7, 5, 3, 7, 5, 5, 1, 1, 3, 5, 7, 1, 7, 3, 1, 1, 5, 7, 3, 7, 7, 3, 3, 7, 5, 1, 3, 5, 3, 5, 3, 1, 3

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

OFFSET

1,1

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

FORMULA

Sum_k={1..n} a(k) ~ 4*n. - Amiram Eldar, Dec 11 2024

MAPLE

seq(ithprime(n) mod 8, n=1..105); # Nathaniel Johnston, Jun 29 2011

MATHEMATICA

Table[Mod[Prime[n], 8], {n, 105}] (* Nathaniel Johnston, Jun 29 2011 *)

Mod[Prime[Range[100]], 8] (* Vincenzo Librandi, May 06 2014 *)