OFFSET
1,1
REFERENCES
J. Peters and J. Stein, Matematische Tafeln. Revised Russian Edition in 1968, Moscow, Table 9a.
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..5000
FORMULA
a(n) = floor( T(n+1)/T(n) ) where T(n) is n-th coefficient in expansion of tan(x).
EXAMPLE
a(5) = floor(T(6)/T(5)) = floor(353792/7936) = floor(44.58) = 44.
MATHEMATICA
Map[Floor[#2/#1] & @@ # &, Partition[Table[If[n < 1, 0, ((-16)^n - (-4)^n) Zeta[1 - 2 n]], {n, 49}], 2, 1]] (* Michael De Vlieger, Jul 31 2017, after Michael Somos at A000182 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved