Triangle T(n,k) of n X n binary matrices with k=0..n^2 ones under action of dihedral group of the square D_4.
A054252
Triangle T(n,k) of n X n binary matrices with k=0..n^2 ones under action of dihedral group of the square D_4.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =1a(8) =1a(9) =3a(10) =8a(11) =16a(12) =23a(13) =23a(14) =16a(15) =8a(16) =3a(17) =1a(18) =1a(19) =3a(20) =21a(21) =77a(22) =252a(23) =567a(24) =1051a(25) =1465a(26) =1674a(27) =1465a(28) =1051a(29) =567
External references
- oeis: A054252