Number of lower triangles of an n X n -5..5 array with all row and column sums zero.
A195519
Number of lower triangles of an n X n -5..5 array with all row and column sums zero.
Terms
- a(0) =1a(1) =1a(2) =11a(3) =671a(4) =401565a(5) =2106810049
External references
- oeis: A195519