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A237708 Number of unit cubes, aligned with a three-dimensional Cartesian mesh, partially encircled along the edge of the first octant of a sphere centered at the origin, ordered by increasing radius. 3
0, 1, 1, 4, 4, 7, 6, 7, 7, 10, 10, 16, 13, 16, 16, 19, 16, 22, 22, 28, 25, 28, 27, 28, 28, 34, 28, 34, 34, 37, 34, 43, 40, 46, 43, 46, 46, 52, 46, 52, 49, 52, 49, 52, 52, 61, 55, 67, 63 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..48.

EXAMPLE

At radius 0, there are no partially filled cubes.  At radius >0 but < sqrt(1), there is 1 partially filled square along the edge of the sphere.  At radius = sqrt(1), there is 1 partially filled cube along the edge of the sphere.  At radius > 1 but < sqrt(2), there  are 4 partially filled cubes.

CROSSREFS

Cf. A000378 (corresponds to the square radius of alternate entries)

Cf. A234300  (2 dimensional analog)

Sequence in context: A271781 A243454 A204008 * A016711 A023404 A140245

Adjacent sequences:  A237705 A237706 A237707 * A237709 A237710 A237711

KEYWORD

nonn

AUTHOR

Rajan Murthy, Feb 11 2014

STATUS

approved

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Last modified April 25 18:12 EDT 2019. Contains 322461 sequences. (Running on oeis4.)