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A084953 n! is the sum of 4 but no fewer nonzero squares. Common terms of A000142 and A004215. 2
10, 12, 24, 25, 48, 49, 54, 60, 78, 91, 96, 97, 107, 114, 120, 121, 142, 151, 167, 170, 172, 180, 192, 193, 212, 222, 226, 238, 240, 241, 246, 252, 270, 279, 301, 307, 309, 318, 327, 333, 344, 345, 360, 361, 367, 375, 379, 384, 385, 403, 405, 421, 424, 425 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

Dario Alpern, Java Applet: Sum of squares.

FORMULA

Equivalently, n! is of the form (4^i)*(8*j+7), i >= 0, j >= 0.

EXAMPLE

a(1) = 10 because 10! cannot be written as the sum of fewer than 4 squares.

PROG

See link.

CROSSREFS

Cf. A000142, A004215, A084966.

Sequence in context: A108703 A098785 A022324 * A235686 A087697 A241177

Adjacent sequences:  A084950 A084951 A084952 * A084954 A084955 A084956

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Jun 15 2003

EXTENSIONS

Edited and extended by Robert G. Wilson v, Jun 17 2003

STATUS

approved

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Last modified April 3 17:03 EDT 2020. Contains 333197 sequences. (Running on oeis4.)