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A179293 Primes of the form (10p)^2 + 1, where p is also prime. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Sequence is a subset of primes of the form n^2 + 1.
LINKS
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
KEYWORD
easy,nonn
AUTHOR
Kevin Batista (kevin762401(AT)yahoo.com), Jul 09 2010
STATUS
approved

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Last modified March 19 07:04 EDT 2024. Contains 370953 sequences. (Running on oeis4.)