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 A308311 #57 Oct 16 2019 17:49:56 %S A308311 16,39,41,55,96,104,123,130,141,142,155,170,181,187,214,239,250,251, %T A308311 260,262,274,341,343,365,385,418,422,424,435,443,464,471,494,503,505, %U A308311 507,543,562,599,632,665,685,706,708,753,754,818,823,835,838,843,850,859 %N A308311 Numbers n which are palindromic in base b, where b = sum of digits of n in base 10. %H A308311 Metin Sariyar, <a href="/A308311/b308311.txt">Table of n, a(n) for n = 1..10000</a> %H A308311 Caldwell and Honaker, <a href="https://primes.utm.edu/curios/page.php?short=41">Prime Curio for 41</a>. %e A308311 41 is a term because 41 = 131 in base 5 = 1 + 4. %t A308311 Select[Range[10^5],#==IntegerReverse[#, Total[IntegerDigits[#]]]&] %o A308311 (PARI) isok(n) = my(s=sumdigits(n)); if (s> 1, my(d = digits(n, s)); d == Vecrev(d)); \\ _Michel Marcus_, Sep 26 2019 %Y A308311 Cf. A007632. %K A308311 nonn,base %O A308311 1,1 %A A308311 _Metin Sariyar_, Sep 26 2019