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, 602636, 767804, 1113524, 1402532, 1751540, 2086748, 2552516, 3008708, 3833180, 4379324, 5533964, 6246668, 7216004, 8087204, 9239516, 10418012, 11927708, 13286732, 14924948, 16322036

Offset

1,1

Links

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

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

Extensions

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

Status

approved