Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 + k*x + sqrt(1 + 2*k*x + k*(k+4)*x^2)).

A307968

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 + k*x + sqrt(1 + 2*k*x + k*(k+4)*x^2)).

Terms

    a(0) =1a(1) =1a(2) =0a(3) =1a(4) =-1a(5) =0a(6) =1a(7) =-2a(8) =0a(9) =0a(10) =1a(11) =-3a(12) =2a(13) =2a(14) =0a(15) =1a(16) =-4a(17) =6a(18) =4a(19) =-3a(20) =0a(21) =1a(22) =-5a(23) =12a(24) =0a(25) =-24a(26) =-1a(27) =0a(28) =1a(29) =-6

External references