OFFSET
1,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
MATHEMATICA
PROG
(PARI) b(n) = floor(sum(k=1, n, frac(k*sqrt(2))));
a(n) = sum(k=1, n, b(k)); \\ Michel Marcus, Nov 06 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Aug 18 2011
STATUS
approved