A048771 - OEIS

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A048771

Partial sums of A048695.

1, 9, 26, 68, 169, 413, 1002, 2424, 5857, 14145, 34154, 82460, 199081, 480629, 1160346, 2801328, 6763009, 16327353, 39417722, 95162804, 229743337, 554649485, 1339042314 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n)=2*a(n-1)+a(n-1)+7; a(0)=1, a(1)=9.`
	EXAMPLE	`a(n)=[ {(8+(9/2)sqrt(2))(1+sqrt(2))^n -(8-(9/2)sqrt(2))(1-sqrt(2))^n}/ 2*sqrt(2) ]-7/2.`
	CROSSREFS	`Cf. A001333, A000129, A048694, A048695.` `Sequence in context: A052153 A154560 A048468 * A055849 A084813 A056409` `Adjacent sequences: A048768 A048769 A048770 * A048772 A048773 A048774`
	KEYWORD	`easy,nice,nonn`
	AUTHOR	`Barry E. Williams`

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Last modified February 15 05:45 EST 2012. Contains 205694 sequences.