Number of nonnegative integer 3 X 3 matrices with sum of elements equal to n, under action of dihedral group of the square D_4.

A054343

Number of nonnegative integer 3 X 3 matrices with sum of elements equal to n, under action of dihedral group of the square D_4.

Terms

    a(0) =1a(1) =3a(2) =11a(3) =31a(4) =84a(5) =198a(6) =440a(7) =904a(8) =1766a(9) =3266a(10) =5802a(11) =9906a(12) =16384a(13) =26284a(14) =41104a(15) =62752a(16) =93831a(17) =137589a(18) =198309a(19) =281249a(20) =393148a(21) =542154a(22) =738480a(23) =994320a(24) =1324668a(25) =1747220a(26) =2283396a(27) =2958228a(28) =3801600a(29) =4848120

External references