1,1

No number == -1 mod 8 is a sum of three squares, so multiples of 8 are missing from this sequence.

It appears that numbers == 1 mod 16 are also missing from the sequence.

Table of n, a(n) for n=1..70.

a(n) = 1+A000408(n). [From R. J. Mathar, Dec 03 2008]

Sequence in context: A000414 A025357 A222949 * A047845 A097703 A310674

Adjacent sequences: A144017 A144018 A144019 * A144021 A144022 A144023

nonn

N. J. A. Sloane, Dec 02 2008, Dec 21 2008

approved