A124897 - OEIS

A124897

a(n) = mu(n^2 + 1), mu = A008683.

-1, -1, 1, -1, 1, -1, 0, 1, 1, -1, 1, 1, -1, -1, 1, -1, -1, 0, 1, -1, -1, 1, -1, -1, 1, -1, -1, 1, 1, 1, -1, 0, -1, 1, 1, -1, -1, 0, 1, -1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, 0, 1, 1, 1, 1, 1, -1, 1, 1, -1, -1, 0, 1, 0, 1, -1, 1, -1, -1, 1, -1, 1, 1, 1, -1, 0, 1, -1, 1, 1, -1, 1, -1, -1, -1, 1, 0, -1, 1, 1, -1, -1, 0, 1, 1, 1, -1, 1, -1, 1

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

OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A008683(A002522(n)) = A124895(n,1);

a(n) = 0 iff A059592(n) > 1;

MATHEMATICA

MoebiusMu[Range[107]^2+1] (* T. D. Noe, Nov 27 2006 *)

PROG

(PARI) a(n) = moebius(n^2+1); \\ Michel Marcus, Jul 26 2022