id:A128439 - OEIS Search Results

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a(n)=Floor(n*t^n), where t=golden ratio=(1+sqrt(5))/2.

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1, 5, 12, 27, 55, 107, 203, 375, 684, 1229, 2189, 3863, 6773, 11801, 20460, 35311, 60707, 104003, 177631, 302539, 513996, 871265, 1473817, 2488367, 4194025, 7057517, 11858508, 19898115, 33345679, 55814939, 93320819, 155867103 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n)=T(n,n), where T is given by A128440.`
	FORMULA	`a(n)=nF(n-1)+Floor(nt*F(n)), where F=A000045, the Fibonacci numbers.`
	EXAMPLE	`a(4) = Floor(4*t^4)`
	CROSSREFS	`Cf. A128440.` `Sequence in context: A038254 A073095 A078517 this_sequence A145768 A160807 A162778` `Adjacent sequences: A128436 A128437 A128438 this_sequence A128440 A128441 A128442`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Mar 03 2007`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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