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A239353
Number of unit hypercubes, aligned with a four-dimensional Cartesian mesh, completely within the first 2^4-ant of a hypersphere centered at the origin, ordered by increasing radius.
4
1, 5, 11, 15, 19, 31, 32, 44, 48, 54, 58, 70, 82, 94, 100, 112, 124, 148, 164, 176, 194, 206, 219, 235, 247, 275, 281, 317, 333, 345, 369, 393, 417, 421, 437
OFFSET
1,2
EXAMPLE
When the radius of the sphere reaches 2, one cube is completely within the sphere. When the radius reaches 7^(1/2), five cubes are completely within the sphere.
CROSSREFS
Cf. A237707 (3-dimensional analog), A232499 (2-dimensional analog). The square radii corresponding to the elements of {a(n)} are the indices of the nonzero terms of A025428.
Sequence in context: A314016 A314017 A314018 * A075628 A314019 A314020
KEYWORD
nonn
AUTHOR
Rajan Murthy, Mar 16 2014
STATUS
approved