A179293 Primes of the form (10p)^2 + 1, where p is also prime.

401, 12101, 16901, 28901, 52901, 184901, 220901, 792101, 1020101, 1144901, 2464901, 3204101, 3648101, 3880901, 3960101, 5428901, 6604901, 7672901, 9672101, 12180101, 12460901, 13468901, 13912901, 14364101, 15132101, 18576101

Offset

1,1

Comments

Sequence is a subset of primes of the form n^2 + 1.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Example

(prime(14)*10)^2 + 1 = (43*10)^2 + 1 = 184901, which is prime.

Mathematica

Select[Table[(10p)^2+1, {p, Prime[Range[100]]}], PrimeQ] (* Harvey P. Dale, May 20 2018 *)

Prog

(Magma) [a: p in PrimesUpTo(25000)|IsPrime(a) where a is (10*p)^2+1] // Vincenzo Librandi, Dec 22 2010

Crossrefs

Sequence in context: A102324 A156785 A031628 * A097742 A115244 A031518

Adjacent sequences: A179290 A179291 A179292 * A179294 A179295 A179296

Keyword

easy,nonn

Author

Kevin Batista (kevin762401(AT)yahoo.com), Jul 09 2010

Status

approved