OFFSET
1,1
LINKS
Carauleanu Marc, Table of n, a(n) for n = 1..4242
FORMULA
a(n) = n + floor(n/(2/sqrt(Pi) - 1)).
MAPLE
MATHEMATICA
f[n_] := n + Floor[n/(2/Sqrt[Pi]-1)]; Array[f, 100, 1]
PROG
(PARI) a(n) = n + floor(n/(2/sqrt(Pi)-1));
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paulo Romero Zanconato Pinto, Sep 26 2016
STATUS
approved