OFFSET
1,1
FORMULA
c(n)=n+[n*sec(1)]+[n*tan(1)].
MATHEMATICA
(See A189756.)
Table[n+Floor[n/Cos[1]]+Floor[(n*Sin[1])/Cos[1]], {n, 80}] (* Harvey P. Dale, Aug 06 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Apr 26 2011
STATUS
approved