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A075726 a(n) = Pi * n^2 rounded off. 2
0, 3, 13, 28, 50, 79, 113, 154, 201, 254, 314, 380, 452, 531, 616, 707, 804, 908, 1018, 1134, 1257, 1385, 1521, 1662, 1810, 1963, 2124, 2290, 2463, 2642, 2827, 3019, 3217, 3421, 3632, 3848, 4072, 4301, 4536, 4778, 5027 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

If only integers are allowed in computations, a(n) gives the sequence of areas of circles in order of increasing radii.

LINKS

Clark Kimberling, Table of n, a(n) for n = 0..1000

MATHEMATICA

Round[Table[Pi * n^2, {n, 0, 40}]]

CROSSREFS

Sequence in context: A192535 A002304 A117516 * A296776 A074498 A041035

Adjacent sequences:  A075723 A075724 A075725 * A075727 A075728 A075729

KEYWORD

easy,nonn

AUTHOR

Joseph L. Pe, Oct 03 2002

STATUS

approved

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Last modified March 18 22:11 EDT 2019. Contains 321305 sequences. (Running on oeis4.)