login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A228272 Volume of sphere (rounded down) with the diameter equal to n. 3
0, 4, 14, 33, 65, 113, 179, 268, 381, 523, 696, 904, 1150, 1436, 1767, 2144, 2572, 3053, 3591, 4188, 4849, 5575, 6370, 7238, 8181, 9202, 10305, 11494, 12770, 14137, 15598, 17157, 18816, 20579, 22449, 24429, 26521, 28730, 31059, 33510, 36086, 38792, 41629, 44602 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

K. D. Bajpai, Table of n, a(n) for n = 1..5000

FORMULA

a(n) = floor((Pi*n^3)/6)).

EXAMPLE

a(6)=113 since volume is (Pi*n^3)/6 = Pi*6^3/6 = 113.0973355 and floor(113.0973355) = 113.

MAPLE

KD := proc() local a; a:= floor(evalf((Pi*n^3)/6));

RETURN (a):

end:

seq(KD(), n=1..100);

CROSSREFS

Cf. A019673 (Pi/6).

Cf. A066645 (volume with radius n).

Cf. A228189 (similar sequence for right circular cone).

Sequence in context: A099590 A078432 A124786 * A011935 A266020 A185441

Adjacent sequences:  A228269 A228270 A228271 * A228273 A228274 A228275

KEYWORD

nonn

AUTHOR

K. D. Bajpai, Aug 19 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified June 28 20:31 EDT 2017. Contains 288840 sequences.