Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] (1/2) * (1 / (exp(x) + exp(y) - exp(x+y))^2 - 1).
A382740
Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] (1/2) * (1 / (exp(x) + exp(y) - exp(x+y))^2 - 1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =7a(5) =1a(6) =1a(7) =19a(8) =19a(9) =1a(10) =1a(11) =43a(12) =127a(13) =43a(14) =1a(15) =1a(16) =91a(17) =559a(18) =559a(19) =91a(20) =1a(21) =1a(22) =187a(23) =2071a(24) =4327a(25) =2071a(26) =187a(27) =1a(28) =1a(29) =379
External references
- oeis: A382740