0,3

Köklüce, Bülent. "Cusp forms in S_6 (Gamma_ 0(23)), S_8 (Gamma_0 (23)) and the number of representations of numbers by some quadratic forms in 12 and 16 variables." The Ramanujan Journal 34.2 (2014): 187-208. See Phi_k, p. 188. (A028930 is Phi_1.)

Alois P. Heinz, Table of n, a(n) for n = 0..5000

Cf. A028930.

Sequence in context: A253104 A122858 A143336 * A053596 A141384 A183400

Adjacent sequences: A328526 A328527 A328528 * A328530 A328531 A328532

nonn

N. J. A. Sloane, Oct 18 2019

approved