A089086 Greatest common divisor of n^2-5 and n^2+5.

5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 1, 2, 1, 2, 5

Offset

0,1

Links

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Mathematica

GCD@@#&/@Table[n^2+{5, -5}, {n, 0, 110}] (* Harvey P. Dale, Jul 17 2016 *)

Prog

(PARI) g(n) = for(x=0, n, print1(gcd(x^2-5, x^2+5)", "))

Crossrefs

Cf. A109013.

Sequence in context: A132690 A326922 A343678 * A238716 A280695 A243258

Adjacent sequences: A089083 A089084 A089085 * A089087 A089088 A089089

Keyword

easy,nonn

Author

Cino Hilliard, Dec 05 2003

Status

approved