1,1

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

Dario Alpern, Java Applet: Sum of squares.

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

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

See link.

Cf. A000142, A004215, A084966.

Sequence in context: A108703 A098785 A022324 * A235686 A087697 A241177

Adjacent sequences: A084950 A084951 A084952 * A084954 A084955 A084956

nonn

Hugo Pfoertner, Jun 15 2003

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

approved