A075726 a(n) = Pi * n^2 rounded off.

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

Offset: 0

Author

Joseph L. Pe, Oct 03 2002

Keywords

• easy
• nonn

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

Programs

Mathematica

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