A087063 Sum{Floor(n*(r^k)): r=sqrt(2)-1, k>=0}.

0, 1, 2, 4, 5, 7, 9, 10, 12, 13, 15, 16, 18, 20, 21, 24, 25, 27, 29, 30, 32, 33, 35, 36, 38, 40, 41, 43, 44, 47, 49, 50, 52, 53, 56, 58, 59, 61, 62, 64, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 89, 90, 92, 94, 96, 98, 99, 101, 102, 104, 105, 107, 109, 110, 113

Offset

0,3

Links

Table of n, a(n) for n=0..68.

Example

a(3)=4=3+[3*r]+[3*r^2]+[3*r^3]+...

Crossrefs

Cf. A005187.

Sequence in context: A289240 A188019 A189382 * A047497 A004956 A026351

Adjacent sequences: A087060 A087061 A087062 * A087064 A087065 A087066

Keyword

nonn

Author

Clark Kimberling, Aug 07 2003

Status

approved