A181348 Denominators of lower triangular matrix T:=log(F), with the matrix F:=A037027 (Fibonacci convolution matrix).

1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 1, 1, 1, 1, 3, 3, 2, 1, 1, 1, 15, 3, 1, 1, 1, 1, 1, 30, 15, 1, 3, 2, 1, 1, 1, 70, 15, 5, 3, 3, 1, 1, 1, 1, 105, 35, 10, 15, 3, 1, 2, 1, 1, 1, 7, 105, 70, 15, 3, 1, 3, 1, 1, 1, 1, 105, 7, 35, 35, 6, 5, 3, 3, 2, 1, 1, 1, 385, 105, 7, 105, 14, 5, 15, 3, 1, 1, 1, 1, 1, 3465

Offset

0,7

Comments

The triangle of the numerators is given by A181347.

See the comments given in A181347.

Links

Table of n, a(n) for n=0..91.

Wolfdieter Lang, A181347/A181348, Logarithm of the Fibonacci matrix A037027

Formula

a(n,m) = denominator((log F)(n,m)), with the Fibonacci lower triangular matrix F=A037027.

Example

The triangle starts with the rows[1]; [1,1]; [1,1,1]; [2,1,1,1]; [3,1,1,1,1]; ...
The rational triangle T (with main diagonal elements 0) starts with the rows [0]; [1, 0]; [1, 2, 0]; [-1/2, 2, 3, 0]; [-1/3, -1, 3, 4, 0];...

Crossrefs

Cf. A037027, A181347.

Sequence in context: A175597 A309400 A294306 * A107682 A349703 A178239

Adjacent sequences: A181345 A181346 A181347 * A181349 A181350 A181351

Keyword

nonn,easy,tabl

Author

Wolfdieter Lang, Oct 15 2010

Status

approved