A066644 a(n) = floor(surface area of a sphere with radius n).
12, 50, 113, 201, 314, 452, 615, 804, 1017, 1256, 1520, 1809, 2123, 2463, 2827, 3216, 3631, 4071, 4536, 5026, 5541, 6082, 6647, 7238, 7853, 8494, 9160, 9852, 10568, 11309, 12076, 12867, 13684, 14526, 15393, 16286, 17203, 18145, 19113, 20106, 21124, 22167
Offset: 1
Links
- Harry J. Smith, Table of n, a(n) for n = 1..1000
Programs
-
Maple
A066644:=n->floor(4*Pi*n^2): seq(A066644(n), n=1..100); # Wesley Ivan Hurt, Sep 15 2015
-
Mathematica
Table[ Floor[4Pi*n^2], {n, 50} ] -
PARI
{ for (n=1, 1000, write("b066644.txt", n, " ", floor(4*Pi*n^2)) ) } \\ Harry J. Smith, Mar 16 2010
Formula
a(n) = floor(4*Pi*n^2).
Extensions
More terms from Robert G. Wilson v, Jan 03 2002