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, 623844, 809604, 1167060, 1464564, 1857708, 2205564, 2702412, 3154140, 4011612, 4581132, 5853684, 6598356, 7608564, 8582796, 9785388, 11012316, 12512076, 13933884, 15643500, 17200572

Offset

1,1

Links

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

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

Extensions

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

Status

approved