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 A070069 #3 Mar 30 2012 17:30:43
%S A070069 11,22,44,88,616,6776,88088,616616,232464232,21154245112,232696696232,
%T A070069 21175399357112,21154245133154245112,232696696464696696232,
%U A070069 21175399378287399357112,63386501441764911946714410568336
%N A070069 a(1) = 11; a(n) = smallest palindromic multiple of a(n-1).
%t A070069 e[1] = 11; e[n_] := e[n] = Block[{k = 2}, While[k*e[n - 1] != ToExpression[ StringReverse[ ToString[k*e[n - 1]]]], k++ ]; k*e[n - 1]]; Table[e[n], {n, 1, 12}]
%Y A070069 Cf. A068664 (from a(5) on) and this sequence (from a(4) on) coincide.
%Y A070069 Cf. A068664, A068665, A068666, A068667, A068668, A068971, A068972, A068973, A068974.
%K A070069 base,nonn
%O A070069 1,1
%A A070069 _Robert G. Wilson v_, Apr 19 2002