Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] (1/4) * (1 / (exp(x) + exp(y) - exp(x+y))^4 - 1).
A382742
Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] (1/4) * (1 / (exp(x) + exp(y) - exp(x+y))^4 - 1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =11a(5) =1a(6) =1a(7) =31a(8) =31a(9) =1a(10) =1a(11) =71a(12) =271a(13) =71a(14) =1a(15) =1a(16) =151a(17) =1291a(18) =1291a(19) =151a(20) =1a(21) =1a(22) =311a(23) =4951a(24) =12011a(25) =4951a(26) =311a(27) =1a(28) =1a(29) =631
External references
- oeis: A382742