A226757 a(n) = number of distinct quadruples of squares modulo n.

1, 16, 16, 16, 81, 256, 256, 81, 256, 1296, 1296, 256, 2401, 4096, 1296, 256, 6561, 4096, 10000, 1296, 4096, 20736, 20736, 1296, 14641, 38416, 14641, 4096, 50625, 20736, 65536, 2401, 20736, 104976, 20736, 4096, 130321, 160000, 38416, 6561, 194481, 65536

Offset

1,2

Links

Table of n, a(n) for n=1..42.

Formula

a(n) = A000224(n)^4. - Andrew Howroyd, Aug 06 2018

Crossrefs

Cf. A000224, A068197.

Sequence in context: A192632 A305945 A010855 * A248764 A238409 A040241

Adjacent sequences: A226754 A226755 A226756 * A226758 A226759 A226760

Keyword

nonn,mult

Author

José María Grau Ribas, Jun 16 2013

Extensions

Name corrected by Andrew Howroyd, Aug 06 2018

Status

approved