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A074928 a(n)>0 such that p(n)*p(n+1)+a(n) is a minimal prime. 7
1, 2, 2, 2, 6, 2, 8, 2, 6, 8, 4, 6, 14, 6, 12, 10, 8, 4, 2, 6, 12, 6, 6, 8, 6, 24, 6, 14, 6, 18, 12, 10, 8, 6, 2, 12, 10, 18, 10, 4, 2, 12, 8, 18, 6, 10, 4, 6, 8, 2, 4, 2, 2, 6, 10, 6, 2, 12, 2, 8, 20, 8, 2, 24, 2, 6, 30, 14, 20, 6, 6, 6, 6, 4, 20, 4, 6, 2, 2, 12, 2, 6, 6, 6, 2, 22, 8, 32, 6, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..90.

EXAMPLE

a(1) = 1 because p(1)*p(2) + 1 = 2*3 + 1 = 7 -> prime

MATHEMATICA

NextPrime[#]-#&/@Times@@@Partition[Prime[Range[100]], 2, 1] (* Harvey P. Dale, May 28 2013 *)

CROSSREFS

Sequence in context: A023957 A224964 A278165 * A285713 A278230 A344859

Adjacent sequences:  A074925 A074926 A074927 * A074929 A074930 A074931

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 02 2002

STATUS

approved

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Last modified September 19 06:21 EDT 2021. Contains 347551 sequences. (Running on oeis4.)