OFFSET
1,4
FORMULA
a(n) = floor(n^2*(1-Pi/4)).
EXAMPLE
a(7)=10 since floor(7^2(1-Pi/4)) = 10.
PROG
(PARI) a(n)=floor(n^2*(1-Pi/4)); \\ Michel Marcus, Sep 05 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
seiringer.flor(AT)eudoramail.com, Oct 18 2000
EXTENSIONS
Edited and extended by James A. Sellers, Oct 20 2000
STATUS
approved