OFFSET
0,2
COMMENTS
The numbers (n*Pi)^(2k)/(2 k)! are the coefficients in the Maclaurin series for cos x when x = n*Pi.
(n*pi)^k/(2 k)! < 1 for every k >= a(n).
MATHEMATICA
a[n_] := Select[Range[300], (n Pi)^(2 #)/(2 #)! < 1 &, 1]
Flatten[Table[a[n], {n, 0, 300}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Oct 01 2024
EXTENSIONS
Edited by Clark Kimberling, Oct 10 2024
STATUS
approved