A144703 - OEIS

A144703

Denominators of triangle S(n,k), n>=0, 0<=k<=ceiling((3n+1)/2): S(n,k) is the coefficient of x^k in polynomial s_n(x), used to define continuous and n times differentiable sigmoidal transfer functions.

2, 2, 2, 1, 2, 2, 1, 1, 1, 2, 2, 4, 1, 2, 2, 4, 2, 16, 1, 16, 1, 16, 2, 16, 2, 2, 1, 2, 1, 2, 1, 2, 2, 2, 16, 1, 4, 1, 8, 1, 4, 2, 16, 1, 2, 32, 1, 32, 1, 16, 1, 16, 2, 32, 1, 32, 2, 256, 1, 128, 1, 256, 1, 64, 1, 256, 1, 128, 2, 256, 2, 128, 1, 64, 1, 128, 1, 32, 1, 128, 2, 64, 2, 128, 2, 2

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OFFSET

0,1

LINKS

Alois P. Heinz, Rows n = 0..114, flattened

MAPLE

seq(seq(denom(coeff(s(n)(x), x, k)), k=0..ceil((3*n+1)/2)), n=0..10);

CROSSREFS

See A144702 for more information on S(n,k).

Sequence in context: A105154 A076447 A136690 * A276825 A270644 A361156

Adjacent sequences: A144700 A144701 A144702 * A144704 A144705 A144706

KEYWORD

frac,tabf,nonn,look

AUTHOR

Alois P. Heinz, Sep 19 2008

STATUS

approved