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A181350 Denominators of row sums of the triangle (lower triangular matrix) log(F) with F:=A037027 (Fibonacci convolution matrix). 2
1, 1, 1, 2, 3, 2, 15, 5, 210, 105, 210, 35, 2310, 693, 6006, 36036, 2145, 90090, 765765, 1531530, 106590, 1711710, 5819814, 5290740, 334639305, 30421755, 334639305, 9561123, 74364290, 39369330 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

The corresponding numerator sequence is A181349.

LINKS

Table of n, a(n) for n=0..29.

FORMULA

a(n) = denominator(sum(T[n,m], m=0..n)), with the matrix T:=log(F), where F:=A037027. Offset of the lower triangular matrix T is [0,0].

EXAMPLE

The signed rational sequence A181349(n)/A181350(n) starts with [0, 1, 3, 9/2, 17/3, 15/2, 142/15, 52/5, 2371/210, 1481/105, 3673/210, 576/35, 23341/2310, 10085/693, 344857/6006, 3298871/36036, -296356/2145 ,...].

CROSSREFS

Sequence in context: A160819 A299700 A205441 * A174111 A164661 A104507

Adjacent sequences:  A181347 A181348 A181349 * A181351 A181352 A181353

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Oct 15 2010

STATUS

approved

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Last modified August 3 14:40 EDT 2021. Contains 346438 sequences. (Running on oeis4.)