A087070 Sum{Floor(n*r^k): r=3/4, k>=0}.

0, 1, 4, 7, 11, 14, 18, 21, 26, 29, 34, 37, 41, 45, 48, 53, 57, 61, 65, 69, 73, 74, 79, 84, 89, 91, 95, 100, 102, 107, 112, 116, 121, 122, 128, 131, 136, 137, 144, 146, 152, 155, 158, 164, 166, 171, 174, 178, 184, 185, 190, 195, 198, 201, 207, 211, 214, 220, 222, 226

Offset

0,3

Links

Table of n, a(n) for n=0..59.

Example

a(3)=7=3+[3*3/4]+[3*9/16]+[3*27/64]+...

Mathematica

Table[Sum[Floor[n (3/4)^k], {k, 0, n}], {n, 0, 60}] (* Harvey P. Dale, Jul 27 2020 *)

Crossrefs

Cf. A005187.

Sequence in context: A047345 A310728 A247157 * A310729 A198271 A368649

Adjacent sequences: A087067 A087068 A087069 * A087071 A087072 A087073

Keyword

nonn

Author

Clark Kimberling, Aug 07 2003

Status

approved