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

Offset

1,1

Links

Table of n, a(n) for n=1..10.

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

Status

approved