Triangle T(n,k) (n >= 3, k = 1..n-2) read by rows giving number of nonisomorphic nondegenerate oriented matroids with n points in n-k dimensions.
A063851
Triangle T(n,k) (n >= 3, k = 1..n-2) read by rows giving number of nonisomorphic nondegenerate oriented matroids with n points in n-k dimensions.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =4a(10) =1a(11) =1a(12) =1a(13) =11a(14) =11a(15) =1a(16) =1a(17) =1a(18) =135a(19) =2628a(20) =135a(21) =1a(22) =1a(23) =1a(24) =4382a(25) =9276601a(26) =9276601a(27) =4382a(28) =1a(29) =1
External references
- oeis: A063851