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 A109952 #14 Jul 23 2025 18:34:25
%S A109952 5,15,45,55,65,75,115,125,145,155,175,195,205,215,255,265,295,315,325,
%T A109952 345,395,405,425,475,505,525,545,555,565,595,645,665,695,705,715,745,
%U A109952 765,775,805,815,845,855,875,925,945,975,995,1025,1045,1055,1065,1095
%N A109952 Degrees Celsius for which Fahrenheit is a prime.
%C A109952 The sequence only includes positive integer values and all terms are multiples of 5 but no terms are multiples of 10. - _Harvey P. Dale_, Jul 23 2025
%H A109952 <a href="http://www.scorpiosite69.freeserve.co.uk/temperature.htm">Temperature Converter</a>.
%e A109952 f = 9 c / 5 + 32; a(1) = c = 5 because f = 41 is a prime.
%t A109952 f[c_]:=9 c /5 +32; A109952 = Select[Range[5, 2000, 5], PrimeQ[f[ # ]]&]
%t A109952 Select[Table[5 (p-32)/9,{p,Prime[Range[10,400]]}],IntegerQ] (* _Harvey P. Dale_, Jul 23 2025 *)
%Y A109952 Cf. A029925, A029926.
%K A109952 nonn
%O A109952 1,1
%A A109952 _Zak Seidov_, Jul 06 2005