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A236926 Number of integer solutions to a^2 + b^2 + c^2 + 3*d^2 = n. 9
1, 6, 12, 10, 18, 48, 40, 12, 60, 78, 24, 48, 70, 84, 120, 32, 66, 192, 84, 36, 144, 180, 120, 96, 136, 126, 168, 82, 84, 336, 200, 60, 252, 288, 96, 96, 234, 228, 360, 140, 120, 480, 144, 84, 336, 336, 240, 192, 310, 258, 252, 128, 252, 624, 400, 96, 408, 540, 168 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..58.

MAPLE

See A236924.

CROSSREFS

Cf. A236924.

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.

Sequence in context: A279606 A164378 A124349 * A134383 A272305 A114797

Adjacent sequences:  A236923 A236924 A236925 * A236927 A236928 A236929

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 15 2014

STATUS

approved

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Last modified May 27 22:57 EDT 2017. Contains 287210 sequences.