OFFSET
-1,2
COMMENTS
a(n) > A000328(n+1) for every n >= 0.
LINKS
G. C. Greubel, Table of n, a(n) for n = -1..5000
MAPLE
seq(floor(Pi*(n+sqrt(2))^2), n=-1..46); # Muniru A Asiru, Oct 11 2018
MATHEMATICA
f[n_] := Floor[Pi (n + Sqrt@2)^2]; Array[f, 47, -1] (* Robert G. Wilson v, Dec 12 2017 *)
PROG
(PARI) a(n)=floor(Pi*(n+sqrt(2))^2)
(Magma) R:=RealField(10); [Floor(Pi(R)*(n+Sqrt(2))^2): n in [-1..50]]; // G. C. Greubel, Oct 10 2018
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Arkadiusz Wesolowski, Nov 12 2017
STATUS
approved
