A087066 a(n) = Sum_{k>=0} floor(n*(r^k)), where r = sqrt(5)-2.

0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 21, 23, 24, 25, 26, 28, 29, 30, 31, 33, 34, 35, 36, 38, 39, 40, 41, 43, 44, 46, 47, 48, 50, 51, 52, 53, 55, 56, 57, 58, 60, 61, 62, 63, 65, 66, 67, 69, 70, 72, 73, 74, 75, 77, 78, 79, 80, 82, 83, 84, 85, 87, 88, 89, 90

Offset

0,3

Links

Table of n, a(n) for n=0..71.

Example

a(5) = 6 = 5 + floor(5*r) + floor(5*r^2) + floor(5*r^3) + ...

Crossrefs

Cf. A005187.

Sequence in context: A225496 A261189 A023721 * A120518 A101888 A190241

Adjacent sequences: A087063 A087064 A087065 * A087067 A087068 A087069

Keyword

nonn

Author

Clark Kimberling, Aug 07 2003

Status

approved