cp's OEIS Frontend

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.

A134347 A007318^(-1) * A134346.

Original entry on oeis.org

1, 2, 3, 2, 8, 7, 2, 12, 24, 15, 2, 16, 48, 64, 31, 2, 20, 80, 160, 160, 63, 2, 24, 120, 320, 480, 384, 127, 2, 28, 168, 560, 1120, 1344, 896, 255, 2, 32, 224, 896, 2240, 3584, 3584, 2048, 511, 2, 36, 288, 1344, 4032, 8064, 10752, 9216, 4608, 1023
Offset: 0

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Author

Gary W. Adamson, Oct 21 2007

Keywords

Examples

			First few rows of the triangle are:
  1;
  2,   3;
  2,   8,   7;
  2,  12,  24,  15;
  2,  16,  48,  64,  31;
  2,  20,  80, 160, 160,  63;
  2,  24, 120, 320, 480, 384, 127;
  ...
		

Crossrefs

Cf. A007318, A134346, A048473 (row sums).

Formula

Inverse binomial transform of A134346, as infinite lower triangular matrices.
Conjecture: T(n,k) = 2^(k+1)*binomial(n,k) for k < n; T(n,n) = 2^(n+1)-1. - Knud Werner, Jan 05 2022