OFFSET
0,3
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
KEYWORD
nonn
AUTHOR
Clark Kimberling, Aug 07 2003
STATUS
approved