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A128439 a(n)=Floor(n*t^n), where t=golden ratio=(1+sqrt(5))/2. 1
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; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

a(n)=T(n,n), where T is given by A128440.

FORMULA

a(n)=n*F(n-1)+Floor(n*t*F(n)), where F=A000045, the Fibonacci numbers.

EXAMPLE

a(4) = Floor(4*t^4)

CROSSREFS

Cf. A128440.

Sequence in context: A176448 A078517 A170828 * A172426 A145768 A162778

Adjacent sequences:  A128436 A128437 A128438 * A128440 A128441 A128442

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu), Mar 03 2007

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Last modified February 16 09:56 EST 2012. Contains 205904 sequences.