1,2

Table of n, a(n) for n=1..26.

Cf. A000118 = number of ways of writing n as a sum of 4 squares; theta series of lattice Z^4.

Cf. A128689.

Sequence in context: A056196 A044069 A028628 * A140403 A108578 A044450

Adjacent sequences: A128687 A128688 A128689 * A128691 A128692 A128693

nonn

Jonathan Vos Post, Mar 21 2007

approved