A053173 Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a four-fold rotation. Also the sequence for the corresponding four-fold rotoinversions.

174, 2694, 8814, 23310, 64782, 105678, 171006, 259446, 368334, 599022

Offset

1,1

Links

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

Crossrefs

A053170 = 2 * (1 + A053171 + A053172 + this sequence + A053174).

Sequence in context: A185534 A185526 A248458 * A185525 A224433 A213866

Adjacent sequences: A053170 A053171 A053172 * A053174 A053175 A053176

Keyword

nonn

Author

Ralf W. Grosse-Kunstleve, Mar 26 2000

Status

approved