Triangle read by rows: T(n,k) = number of rational (+1,-1) matrices of rank k (n >= 1, 1 <= k <= n).
A064231
Triangle read by rows: T(n,k) = number of rational (+1,-1) matrices of rank k (n >= 1, 1 <= k <= n).
Terms
- a(0) =2a(1) =8a(2) =8a(3) =32a(4) =288a(5) =192a(6) =128a(7) =6272a(8) =36864a(9) =22272a(10) =512a(11) =115200a(12) =3456000a(13) =18432000a(14) =11550720a(15) =2048a(16) =1968128a(17) =243302400a(18) =6471168000a(19) =36373708800a(20) =25629327360a(21) =8192a(22) =32514048a(23) =14809546752
External references
- oeis: A064231