A201710 - OEIS

%I #6 Sep 08 2022 08:46:01

%S 3,13,43,163,643,1213,1693,3613,4003,6763,9613,10243,12253,13693,

%T 18493,21163,22093,27043,30253,44893,49003,72253,82813,96043,100003,

%U 102013,112363,114493,141613,153763,156253,169003,179563,196003,228013

%N Primes of the form 10n^2 + 3.

%H Vincenzo Librandi, <a href="/A201710/b201710.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Table[10n^2+3,{n,0,800}],PrimeQ]

%o (Magma) [a: n in [0..300] | IsPrime(a) where a is 10*n^2+3];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 04 2011