A053172 Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a three-fold rotation.

308, 1916, 9572, 20732, 43148, 73052, 155156, 219716, 331892, 440036

Offset

1,1

Links

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

Formula

A053170(n) = 2 * (1 + A053171(n) + a(n) + A053173(n) + A053174(n)).

Crossrefs

Cf. A053170, A053171, A053173, A053174.

Sequence in context: A249552 A237457 A234211 * A343273 A337955 A091552

Adjacent sequences: A053169 A053170 A053171 * A053173 A053174 A053175

Keyword

nonn,more

Author

Ralf W. Grosse-Kunstleve, Mar 26 2000

Status

approved