A164586 - OEIS

This site is supported by donations to The OEIS Foundation.

A164586

Row sums of generalized rhombic triangle A164585.

1, 1, 3, 8, 19, 51, 134, 354, 952, 2558, 6917, 18787, 51146, 139702, 382464, 1049221, 2883964, 7939822, 21891635, 60440322, 167068352 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`G.f.: (1-2x-2x^2-x^3- sqrt (1-4x^2-10x^3-4x^4+x^6))/(2x(x^4+3x^3+4x^2+x-1)).`
	CROSSREFS	`Sequence in context: A126874 A121811 A181849 * A018032 A086808 A170900` `Adjacent sequences: A164583 A164584 A164585 * A164587 A164588 A164589`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Aug 17 2009`

Content is available under The OEIS End-User License Agreement .

Last modified February 14 17:59 EST 2012. Contains 205657 sequences.