1,3

Table of n, a(n) for n=1..29.

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

Cf. A128690.

Sequence in context: A076061 A025523 A173382 * A116137 A178611 A293976

Adjacent sequences: A128686 A128687 A128688 * A128690 A128691 A128692

nonn

Jonathan Vos Post, Mar 21 2007

Missing term 378 added by Giovanni Resta, Jun 18 2016

approved