A053171 Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a rotation of order 2.

81, 321, 825, 1689, 2601, 4185, 5529, 8145, 10401, 13137, 15345, 20577, 23265, 27057, 32529, 39057, 42585, 48993, 53097, 61881, 69753, 75993, 80745, 96297, 103497, 110745, 119241, 131865, 138345, 154089

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Formula

A053170(n) = 2 * (1 + a(n) + A053172(n) + A053173(n) + A053174(n)).

Crossrefs

Cf. A053170, A053172, A053173, A053174.

Sequence in context: A237325 A158776 A101963 * A237412 A237405 A250443

Adjacent sequences: A053168 A053169 A053170 * A053172 A053173 A053174

Keyword

nonn,more

Author

Ralf W. Grosse-Kunstleve, Mar 26 2000

Extensions

a(11)-a(30) from Bert Dobbelaere, Apr 18 2025

Status

approved