OFFSET
2,1
LINKS
J. A. C. Weideman, Numerical Integration of Periodic Functions: A Few Examples, Amer. Math. Monthly, 109 (2002), 30-32.
FORMULA
a(n) = round(((2*Pi/(3^(3/2)))*((6*n-5)/6))^(3/2)).
EXAMPLE
a(2)=2 since 7*sqrt(7)*Pi^(3/2) / (27 3^(3/4)) = 1.6755877...
MATHEMATICA
Table[Round[((2 Pi/(3^(3/2))) ((6 n - 5)/6))^(3/2)], {n, 2, 57}] (* Michael De Vlieger, Sep 29 2017 *)
PROG
(PARI) a(n) = round(((2*Pi/(3^(3/2)))*((6*n-5)/6))^(3/2)); \\ Michel Marcus, Sep 29 2017
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Marc LeBrun, Jan 29 2002
STATUS
approved