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 A066644 a(n) = floor(surface area of a sphere with radius n). 5
 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 (list; graph; refs; listen; history; text; internal format)
 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 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} ] PROG (PARI) { for (n=1, 1000, write("b066644.txt", n, " ", floor(4*Pi*n^2)) ) } \\ Harry J. Smith, Mar 16 2010 CROSSREFS Sequence in context: A009932 A009933 A009930 * A009934 A009927 A009938 Adjacent sequences: A066641 A066642 A066643 * A066645 A066646 A066647 KEYWORD easy,nonn AUTHOR Amarnath Murthy, Dec 29 2001 EXTENSIONS More terms from Robert G. Wilson v, Jan 03 2002 STATUS approved

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Last modified May 24 12:09 EDT 2024. Contains 372773 sequences. (Running on oeis4.)