OFFSET
1,3
MAPLE
f := n->round(evalf(tan((1-1/n)*Pi/2)));
PROG
(PARI) a(n) = round(tan(Pi*(1-1/n)/2)); \\ Michel Marcus, Jun 22 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Offset corrected and more terms from Sean A. Irvine, Jun 22 2020
STATUS
approved