OFFSET
1,2
LINKS
C. Kimberling, Problem 10520, Amer. Math. Mon. 103 (1996) p. 347.
FORMULA
a(n) = Sum_{i=0..n-1} A080039(i).
MATHEMATICA
Table[Sum[Floor[(1 + Sqrt[2])^(n - k)], {k, Infinity}], {n, 1, 27}] (* Alonso del Arte, Nov 30 2010 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Revised Feb 03 1999. Revised Nov 30 2010.
STATUS
approved