OFFSET
1,1
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = floor(4*Pi*n^2).
MAPLE
MATHEMATICA
Table[ Floor[4Pi*n^2], {n, 50} ]
PROG
(PARI) { for (n=1, 1000, write("b066644.txt", n, " ", floor(4*Pi*n^2)) ) } \\ Harry J. Smith, Mar 16 2010
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Amarnath Murthy, Dec 29 2001
EXTENSIONS
More terms from Robert G. Wilson v, Jan 03 2002
STATUS
approved