Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a three-fold rotation.

A053172

Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a three-fold rotation.

Terms

    a(0) =308a(1) =1916a(2) =9572a(3) =20732a(4) =43148a(5) =73052a(6) =155156a(7) =219716a(8) =331892a(9) =440036a(10) =602636a(11) =767804a(12) =1113524a(13) =1402532a(14) =1751540a(15) =2086748a(16) =2552516a(17) =3008708a(18) =3833180a(19) =4379324a(20) =5533964a(21) =6246668a(22) =7216004a(23) =8087204a(24) =9239516a(25) =10418012a(26) =11927708a(27) =13286732a(28) =14924948a(29) =16322036

External references