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 A153288 #2 Mar 30 2012 17:34:28
%S A153288 2,3,3,2,14,2,2,25,25,2,2,36,86,36,2,2,47,194,194,47,2,2,58,302,734,
%T A153288 302,58,2,2,69,410,1706,1706,410,69,2,2,80,518,3390,5142,3390,518,80,2
%N A153288 A triangular sequence designed with row sums 2*3^n with first column A064263.
%C A153288 Row sums are:
%C A153288 {2, 6, 18, 54, 162, 486., 1458, 4374., 13122,...}.
%C A153288 Sequence was calculated to the 3^n level by hand.
%e A153288 {2},
%e A153288 {3, 3},
%e A153288 {2, 14, 2},
%e A153288 {2, 25, 25, 2},
%e A153288 {2, 36, 86, 36, 2},
%e A153288 {2, 47, 194, 194, 47, 2},
%e A153288 {2, 58, 302, 734, 302, 58, 2},
%e A153288 {2, 69, 410, 1706, 1706, 410, 69, 2},
%e A153288 {2, 80, 518, 3390, 5142, 3390, 518, 80, 2}
%t A153288 (* first column : A064263*)
%t A153288 b = {{2}, {3, 3}, {2, 14, 2}, {2, 25, 25, 2}, {2, 36, 86, 36, 2},
%t A153288 {2, 47, 194, 194, 47, 2}, {2, 58, 302, 734, 302, 58, 2},
%t A153288 {2, 69, 410, 1706, 1706, 410, 69, 2}, {2, 80, 518, 3390, 5142, 3390, 518, 80, 2}}
%t A153288 Flatten[b]
%Y A153288 A064263
%K A153288 nonn,tabl
%O A153288 0,1
%A A153288 _Roger L. Bagula_, Dec 23 2008