A181350 - OEIS

%I #3 Jul 23 2012 09:48:35

%S 1,1,1,2,3,2,15,5,210,105,210,35,2310,693,6006,36036,2145,90090,

%T 765765,1531530,106590,1711710,5819814,5290740,334639305,30421755,

%U 334639305,9561123,74364290,39369330

%N Denominators of row sums of the triangle (lower triangular matrix) log(F) with F:=A037027 (Fibonacci convolution matrix).

%C The corresponding numerator sequence is A181349.

%F 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].

%e 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 ,...].

%K nonn,easy

%O 0,4

%A _Wolfdieter Lang_, Oct 15 2010