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A225874 Primes of the form 5*p^2+5*p+1, where p is a prime. 0
31, 61, 151, 281, 661, 911, 1531, 1901, 9461, 18911, 25561, 27011, 31601, 51511, 57781, 59951, 81281, 86461, 94531, 97301, 111751, 114761, 140281, 183361, 187211, 286801, 347161, 363151, 401861, 485161, 603781, 697511, 720101, 758551, 806011, 939611, 965801 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes generated in A175063.

The square roots of (4*a(n)+1)/5 are in A072055. [Bruno Berselli, May 19 2013]

LINKS

Table of n, a(n) for n=1..37.

MATHEMATICA

Select[Table[p=Prime[n]; 5*p^2+5*p+1, {n, 85}], PrimeQ]

PROG

(MAGMA) [a: p in PrimesUpTo(500) | IsPrime(a) where a is 5*p^2+5*p+1]; // Bruno Berselli, May 19 2013

CROSSREFS

Cf. A175063.

Sequence in context: A136066 A282326 A114991 * A139892 A088464 A088463

Adjacent sequences:  A225871 A225872 A225873 * A225875 A225876 A225877

KEYWORD

nonn

AUTHOR

Jayanta Basu, May 19 2013

STATUS

approved

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Last modified November 15 06:29 EST 2019. Contains 329144 sequences. (Running on oeis4.)