A066977 a(n) = gcd(prime(n^2) + 1, prime(n) + 1).

3, 4, 6, 2, 2, 2, 6, 4, 12, 2, 2, 2, 2, 2, 12, 54, 20, 2, 2, 6, 2, 2, 12, 18, 2, 6, 8, 4, 2, 2, 2, 22, 2, 2, 2, 4, 2, 2, 24, 6, 36, 2, 2, 2, 6, 2, 4, 2, 4, 2, 18, 120, 2, 6, 2, 6, 6, 8, 2, 2, 2, 14, 2, 6, 2, 2, 4, 2, 6, 2, 6, 72, 2, 2, 2, 24, 10, 2, 6, 10, 84, 2, 6, 2, 22, 6, 2, 2, 2, 4, 6, 16

Offset

1,1

Links

Harry J. Smith, Table of n, a(n) for n = 1..1000

Prog

(PARI) a(n) = { gcd(prime(n^2) + 1, prime(n) + 1) } \\ Harry J. Smith, Apr 12 2010

Crossrefs

Sequence in context: A388224 A122601 A125776 * A007551 A161012 A065446

Adjacent sequences: A066974 A066975 A066976 * A066978 A066979 A066980

Keyword

nonn

Author

Benoit Cloitre, Jan 26 2002

Status

approved