The number of upper-triangular matrices whose nonzero entries are positive odd numbers summing to n and each row and each column contains a nonzero entry.
A289317
The number of upper-triangular matrices whose nonzero entries are positive odd numbers summing to n and each row and each column contains a nonzero entry.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =7a(5) =23a(6) =84a(7) =364a(8) =1792a(9) =9953a(10) =61455a(11) =417720a(12) =3098515a(13) =24902930a(14) =215538825a(15) =1998518430a(16) =19761943208a(17) =207571259703
External references
- oeis: A289317