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A058263 GCD of p-1 and q-1 where p and q are consecutive primes. +0
8
1, 2, 2, 2, 2, 4, 2, 2, 2, 2, 6, 4, 2, 2, 2, 2, 2, 6, 2, 2, 6, 2, 2, 8, 4, 2, 2, 2, 4, 14, 2, 2, 2, 2, 2, 6, 6, 2, 2, 2, 2, 10, 2, 4, 2, 6, 6, 2, 2, 4, 2, 2, 10, 2, 2, 2, 2, 6, 4, 2, 2, 2, 2, 2, 4, 2, 6, 2, 2, 4, 2, 2, 6, 6, 2, 2, 4, 4, 8, 2, 2, 10, 2, 6, 2, 2, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 18, 6, 2, 2 (list; graph; listen)
OFFSET

0,2

FORMULA

a(n)=GCD[A006093(n+1), A006093(n)]

EXAMPLE

GCD[97-1,89-1]=GCD[96,88]=8=a(24)

CROSSREFS

A006093.

Sequence in context: A109810 A122066 A053238 this_sequence A048669 A158522 A034444

Adjacent sequences: A058260 A058261 A058262 this_sequence A058264 A058265 A058266

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Dec 06 2000

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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