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 A238893 #6 Mar 08 2014 12:43:15
%S A238893 179,238,135,268,359,137,137,258,136,268,237,578,268,567,589,137,257,
%T A238893 367,269,138,136,138,489,679,678,137,268,137,268,178,179,289,135,258,
%U A238893 147,137,137,137,128,268,137,137,268,137,137,137,137,248,139,259,137
%N A238893 Encoded bases for which A214425(n) is palindromic.
%C A238893 The three bases b < c < d are encoded as one number (b-1)*100 + (c-1)*10 + (d-1). Similar to A214427 which tabulates the single base for which A214423(n) is palindromic. The vast majority of these palindromes are for the three bases (2,4,8), which encodes as 137 in this sequence.
%H A238893 T. D. Noe, <a href="/A238893/b238893.txt">Table of n, a(n) for n = 1..1234</a>
%e A238893 A214425(1) = 9. The number 9 is palindromic in 3 bases: 2, 8, and 10. Hence, a(1) = 179.
%t A238893 n = -1; t = {}; While[Length[t] < 51, n++; If[Count[c = Table[s = IntegerDigits[n, m]; s == Reverse[s], {m, 2, 10}], True] == 3, d = Flatten[Position[c, True]]; AppendTo[t, 100*d[[1]] + 10*d[[2]] + d[[3]]]]]; t
%Y A238893 Cf. A214423, A214425, A214427, A238338.
%K A238893 nonn,base
%O A238893 1,1
%A A238893 _T. D. Noe_, Mar 07 2014