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 A152716 #10 Feb 26 2014 10:29:28
%S A152716 1,1,1,1,4,1,1,4,4,1,1,4,16,4,1,1,4,16,16,4,1,1,4,16,64,16,4,1,1,4,16,
%T A152716 64,64,16,4,1,1,4,16,64,256,64,16,4,1,1,4,16,64,256,256,64,16,4,1,1,4,
%U A152716 16,64,256,1024,256,64,16,4,1
%N A152716 Triangle T(n,k) read by rows: T(n,k) = 4^min(k, n-k) = 4^A004197(n,k).
%C A152716 Row sums are: {1, 2, 6, 10, 26, 42, 106, 170, 426, 682, 1706,...} = A061547(n+2).
%F A152716 T(n,k) = 4^min(k, n-k). - _Philippe Deléham_, Feb 25 2014
%F A152716 T(n,k) = A144464(n,k)^2. - _Philippe Deléham_, Feb 26 2014
%e A152716 {1},
%e A152716 {1, 1},
%e A152716 {1, 4, 1},
%e A152716 {1, 4, 4, 1},
%e A152716 {1, 4, 16, 4, 1},
%e A152716 {1, 4, 16, 16, 4, 1},
%e A152716 {1, 4, 16, 64, 16, 4, 1},
%e A152716 {1, 4, 16, 64, 64, 16, 4, 1},
%e A152716 {1, 4, 16, 64, 256, 64, 16, 4, 1},
%e A152716 {1, 4, 16, 64, 256, 256, 64, 16, 4, 1},
%e A152716 {1, 4, 16, 64, 256, 1024, 256, 64, 16, 4, 1}
%t A152716 Clear[a, k, m]; k = 4; a[0] = {1}; a[1] = {1, 1};
%t A152716 a[n_] := a[n] = Join[{1}, k*a[n - 2], {1}];
%t A152716 Table[a[n], {n, 0, 10}];
%t A152716 Flatten[%]
%Y A152716 Cf. A004197, A144464, A152714, A152717.
%K A152716 nonn,easy,tabl
%O A152716 0,5
%A A152716 _Roger L. Bagula_ and _Gary W. Adamson_, Dec 11 2008
%E A152716 Better name by _Philippe Deléham_, Feb 25 2014