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A104995 Smallest prime such that n*(k(n)^2)+n*k(n)+1 is a prime > (n-1)*((k(n-1)^2)+(n-1)*k(n-1)+1 with k(n)>1 or 0 if n=4 as no prime possible. 1
7, 13, 19, 0, 31, 37, 43, 97, 109, 421, 463, 673, 937, 1009, 2341, 3361, 3571, 6841, 8779, 9241, 10627, 16633, 17389, 19489, 21751, 22621, 25111, 26041, 34511, 42181, 45943, 49921, 51481, 58549, 60271, 68113, 94351, 104729, 115831, 118801, 130873 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

sequence of k(n) given in A104994

LINKS

Table of n, a(n) for n=1..41.

EXAMPLE

1*2^2+1*2+1=7 prime with k(1)=2

2*2^2+2*2+1=13 prime > 7 with k(2)=2

3*2^2+3*2+1=19 prime > 13 with k(3)=2

5*2^2+5*2+1=31 prime > 19 with k(5)=2

CROSSREFS

Cf. A104994.

Sequence in context: A005762 A212454 A266731 * A107744 A254762 A275681

Adjacent sequences:  A104992 A104993 A104994 * A104996 A104997 A104998

KEYWORD

nonn

AUTHOR

Pierre CAMI, Mar 31 2005

STATUS

approved

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Last modified October 31 05:06 EDT 2020. Contains 338098 sequences. (Running on oeis4.)