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.

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A297704 Triangle read by rows, T(n,k) = binomial(n, k)*hypergeom2F1(k - n, n + 1, k + 2, -2) for n >= 0 and 0 <= k <= n.

Original entry on oeis.org

1, 3, 1, 15, 6, 1, 93, 39, 9, 1, 645, 276, 72, 12, 1, 4791, 2073, 576, 114, 15, 1, 37275, 16242, 4689, 1020, 165, 18, 1, 299865, 131295, 38889, 8979, 1635, 225, 21, 1, 2474025, 1087080, 327960, 78888, 15510, 2448, 294, 24, 1
Offset: 0

Views

Author

Peter Luschny, Jan 07 2018

Keywords

Examples

			Triangle starts:
[0]     1
[1]     3,     1
[2]    15,     6,    1
[3]    93,    39,    9,    1
[4]   645,   276,   72,   12,   1
[5]  4791,  2073,  576,  114,  15,  1
[6] 37275, 16242, 4689, 1020, 165, 18, 1
		

Crossrefs

T(n, 0) = A103210(n).
Row sums are A243626(n+1).

Programs

  • Mathematica
    T[n_, k_] := Binomial[n, k] Hypergeometric2F1[k - n, n + 1, k + 2, -2];
    Table[T[n, k], {n, 0, 6}, {k, 0, n}] // Flatten
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