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A119677 a(n) is the number of complete squares that fit inside the circle with radius n, drawn on squared paper. 1
0, 0, 4, 16, 32, 60, 88, 120, 164, 216, 276, 332, 392, 476, 556, 648, 732, 832, 936, 1052, 1176, 1288, 1428, 1560, 1696, 1860, 2016, 2180, 2340, 2512, 2700, 2876, 3080, 3276, 3488, 3712, 3908, 4144, 4360, 4620, 4864, 5096, 5356, 5616, 5900 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) = 4 * A001182(n).

As n -> infinity, lim a(n)/(n^2) -> pi.

LINKS

Table of n, a(n) for n=0..44.

CROSSREFS

Cf. A001182.

Sequence in context: A239611 A031050 A243980 * A126032 A034713 A101653

Adjacent sequences:  A119674 A119675 A119676 * A119678 A119679 A119680

KEYWORD

nonn

AUTHOR

Tomas Kyselica (Tomas.Kyselica(AT)gmail.com), Jul 29 2006

EXTENSIONS

More terms from Don Reble (djr(AT)nk.ca), Aug 01 2006

STATUS

approved

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Last modified March 28 05:07 EDT 2017. Contains 284182 sequences.