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 A113016 #12 Feb 16 2025 08:32:59 %S A113016 2,3,5,7,11,17,31,37,61,67,107,131,157,167,181,241,251,271,277,307, %T A113016 347,397,401,421,431,457,541,557,577,587,617,647,661,701,727,751,797, %U A113016 881,907,971,1021,1051,1061,1087,1151,1201,1231,1297,1301,1367,1471,1601 %N A113016 Primes that remain primes when their decimal representation is interpreted duodecimally. %H A113016 Robert Price, <a href="/A113016/b113016.txt">Table of n, a(n) for n = 1..3642</a> %H A113016 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Duodecimal.html">Duodecimal</a> %e A113016 A000040(19) = 67 -> 6*12^1 + 7*12^0 = 72 + 7 = 79 = A000040(22). %t A113016 Select[ Prime[ Range[256]], PrimeQ[ FromDigits[ IntegerDigits[ # ], 12]] &] (* _Robert G. Wilson v_, Oct 12 2005 *) %Y A113016 Cf. A113017, A102487, A000040. %K A113016 nonn,base %O A113016 1,1 %A A113016 _Reinhard Zumkeller_, Oct 11 2005