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Table of n, a(n) for n=1..61.
a(n) = floor(n^2*(1-Pi/4)).
a(7)=10 since floor(7^2(1-Pi/4)) = 10.
(PARI) a(n)=floor(n^2*(1-Pi/4)); \\ Michel Marcus, Sep 05 2014
Sequence in context: A077000 A195311 A184013 * A112509 A173137 A212986
Adjacent sequences: A057669 A057670 A057671 * A057673 A057674 A057675
seiringer.flor(AT)eudoramail.com, Oct 18 2000
Edited and extended by James A. Sellers, Oct 20 2000