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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.
5
174, 2694, 8814, 23310, 64782, 105678, 171006, 259446, 368334, 599022
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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
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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)