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 A036961 #14 Mar 14 2025 18:19:16
%S A036961 2,3,5,8,10,17,22,29,31,38,43,50,52,59,71,85,94,106,115,122,127,134,
%T A036961 143,155,157,169,185,197,211,218,220,227,239,241,248,260,262,274,290,
%U A036961 295,304,316,323,325,332,337,353,358,365,367,379,386,388,395,409,428
%N A036961 Primes with digits (0,...,6) taken as base 7 and converted to base 10.
%H A036961 Harvey P. Dale, <a href="/A036961/b036961.txt">Table of n, a(n) for n = 1..1000</a>
%e A036961 a(n)=323 -> is 641{7} -> 641{10} is prime.
%t A036961 pd7[n_]:=With[{c=IntegerDigits[n]},If[Max[c]<7,FromDigits[c,7],Nothing]]; pd7/@Prime[Range[300]] (* _Harvey P. Dale_, Mar 14 2025 *)
%Y A036961 Cf. A036952-A036964.
%K A036961 nonn,base
%O A036961 1,1
%A A036961 _Patrick De Geest_, Jan 04 1999