id:A111966 - OEIS Search Results

Search: id:A111966

Displaying 1-1 of 1 results found.

page 1

A111966

Expansion of 1/(sqrt(1-6x+5x^2)-x).

+0
3

1, 4, 18, 86, 424, 2128, 10798, 55190, 283510, 1461730, 7557166, 39153338, 203188892, 1055863564, 5492668906, 28598497610, 149012237696, 776904940576, 4052654604042, 21149661562298, 110415949871240, 576636302495488 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of number triangle A111965.`
	FORMULA	`a(n)=sum{k=0..n, sum{j=0..n, C((k+2j-1)/2, j)C(j, n-j-k)(-6)^(k-n+2j)5^(n-k-j)}}`
	CROSSREFS	`Sequence in context: A151252 A084847 A082685 this_sequence A153294 A164045 A130524` `Adjacent sequences: A111963 A111964 A111965 this_sequence A111967 A111968 A111969`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Aug 23 2005`

page 1

Search completed in 0.002 seconds

Last modified December 6 19:54 EST 2009. Contains 170429 sequences.

AT&T Labs Research