A053174 Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a six-fold rotation. Also the sequence for the corresponding six-fold rotoinversions.

228, 1596, 9660, 20988, 43284, 77028, 163452, 230796, 343788, 455628

Offset

1,1

Links

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

Formula

A053170(n) = 2 * (1 + A053171(n) + A053172(n) + A053173(n) + a(n)).

Crossrefs

Cf. A053170, A053171, A053172, A053173.

Sequence in context: A228963 A252220 A263301 * A335270 A103837 A302755

Adjacent sequences: A053171 A053172 A053173 * A053175 A053176 A053177

Keyword

nonn,more

Author

Ralf W. Grosse-Kunstleve, Mar 26 2000

Status

approved