A048755 - OEIS

This site is supported by donations to The OEIS Foundation.

A048755

Partial sums of A048693.

1, 7, 20, 52, 129, 315, 764, 1848, 4465, 10783, 26036, 62860, 151761, 366387, 884540, 2135472, 5155489, 12446455, 30048404, 72543268 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n)=2a(n-1)+a(n-2)+5; a(0)=1, a(1)=6.` `a(n)=[ {(6+(7/2)sqrt(2))(1+sqrt(2))^n - (6-(7/2)sqrt(2))(1-sqrt(2))^n}/ 2sqrt(2) ]-5/2.`
	CROSSREFS	`Cf. A048693, A048654, A048655.` `Sequence in context: A100206 A007044 A047862 * A055267 A196584 A009370` `Adjacent sequences: A048752 A048753 A048754 * A048756 A048757 A048758`
	KEYWORD	`easy,nonn`
	AUTHOR	`Barry E. Williams`

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

Last modified February 15 03:33 EST 2012. Contains 205694 sequences.