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 A380114 #16 Feb 05 2025 02:17:54 %S A380114 1,0,2,0,4,4,0,8,16,8,0,16,48,48,16,0,32,128,192,128,32,0,64,320,640, %T A380114 640,320,64,0,128,768,1920,2560,1920,768,128,0,256,1792,5376,8960, %U A380114 8960,5376,1792,256,0,512,4096,14336,28672,35840,28672,14336,4096,512 %N A380114 Triangle read by rows: The convolution triangle of 2^n, where the convolution triangle of a sequence is defined in A357368. %H A380114 Paolo Xausa, <a href="/A380114/b380114.txt">Table of n, a(n) for n = 0..11475</a> (rows 0..150 of triangle, flattened). %F A380114 T(n, k) = 2^n * A097805(n, k). - _Werner Schulte_, Feb 04 2025 %e A380114 Triangle begins: %e A380114 [0] [1] %e A380114 [1] [0, 2] %e A380114 [2] [0, 4, 4] %e A380114 [3] [0, 8, 16, 8] %e A380114 [4] [0, 16, 48, 48, 16] %e A380114 [5] [0, 32, 128, 192, 128, 32] %e A380114 [6] [0, 64, 320, 640, 640, 320, 64] %e A380114 [7] [0, 128, 768, 1920, 2560, 1920, 768, 128] %e A380114 [8] [0, 256, 1792, 5376, 8960, 8960, 5376, 1792, 256] %e A380114 [9] [0, 512, 4096, 14336, 28672, 35840, 28672, 14336, 4096, 512] %t A380114 A380114[n_, k_] := 2^n*Binomial[n - 1, k - 1]; %t A380114 Table[A380114[n, k], {n, 0, 10}, {k, 0, n}] (* _Paolo Xausa_, Feb 05 2025 *) %o A380114 (Python) # The function ConvTriangle is defined in A357368. %o A380114 print(ConvTriangle(10, lambda n: 2**n)) %Y A380114 Cf. A357368, A081294 (row sums), A380115 (row max), A038207 (2^(n-1)), A097805. %K A380114 nonn,tabl %O A380114 0,3 %A A380114 _Peter Luschny_, Feb 03 2025