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A236930 Number of integer solutions to a^2 + b^2 + c^2 + 5*d^2 = n. 9
1, 6, 12, 8, 6, 26, 36, 24, 28, 42, 72, 72, 8, 48, 108, 48, 54, 64, 84, 120, 26, 72, 144, 88, 84, 126, 216, 80, 24, 180, 156, 192, 92, 96, 288, 144, 42, 144, 240, 144, 168, 252, 144, 168, 72, 182, 396, 184, 72, 258, 372, 192, 48, 208, 360, 312, 252, 160, 360, 360, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..60.

MAPLE

See A236924.

MATHEMATICA

For number of solutions to a^2+b^2+c^2+k*d^2=n for k=1, 2, 3, 4, 5, 6, 7, 8, 12 see A000118, A236928, A236926, A236923, A236930, A236931, A236932, A236927, A236933.

CROSSREFS

Sequence in context: A281484 A236931 A028659 * A028643 A236923 A028627

Adjacent sequences:  A236927 A236928 A236929 * A236931 A236932 A236933

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 16 2014

STATUS

approved

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Last modified April 25 10:11 EDT 2017. Contains 285379 sequences.