Number of lower triangles of a 5 X 5 -n..n array with all row and column sums zero.
A195523
Number of lower triangles of a 5 X 5 -n..n array with all row and column sums zero.
Terms
- a(0) =199a(1) =3753a(2) =27267a(3) =121367a(4) =401565a(5) =1089411a(6) =2563933a(7) =5423365a(8) =10557163a(9) =19228309a(10) =33165903a(11) =54668043a(12) =86714993a(13) =133092639a(14) =198526233a(15) =288824425a(16) =411033583a(17) =573602401a(18) =786556795a(19) =1061685087a(20) =1412733477a(21) =1855611803a(22) =2408609589
External references
- oeis: A195523