This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A184803 #16 Apr 21 2021 04:25:39
%S A184803 1,5,6,8,13,14,24,30,32,33,40,48,49,57,59,67,73,75,81,89,100,107,108,
%T A184803 115,118,124,126,127,140,142,151,158,167,174,183,193,194,201,209,218,
%U A184803 220,225,228,233,234,242,245,252,268,269,276,277,287,288,295,296,301,303,328,336,344,346,352,362,363,370,371,386,394,395,397,406,411,421,437,440,446,456,457,462,465,488,489,491,496,505,515,516,524,531,547,550,559,572,574,582,583,590,591
%N A184803 Numbers k such that floor(k*sqrt(5)) is prime.
%e A184803 See A184802.
%t A184803 (See A184802.)
%t A184803 With[{c=Sqrt[5]},Select[Range[600],PrimeQ[Floor[# c]]&]] (* _Harvey P. Dale_, Jul 20 2011 *)
%o A184803 (PARI) is(n)=isprime(sqrtint(5*n^2)) \\ _Charles R Greathouse IV_, May 22 2017
%Y A184803 Cf. A022839, A184802, A184803, A184804.
%K A184803 nonn
%O A184803 1,2
%A A184803 _Clark Kimberling_, Jan 22 2011