Series expansion of the exponential generating function exp(-tridend(-x)) - 1 where tridend(x) = (1 - 3*x - sqrt(1-6*x+x^2)) / (4*x) (A001003).

A383991

Series expansion of the exponential generating function exp(-tridend(-x)) - 1 where tridend(x) = (1 - 3*x - sqrt(1-6*x+x^2)) / (4*x) (A001003).

Terms

    a(0) =0a(1) =1a(2) =-5a(3) =49a(4) =-743a(5) =15421a(6) =-407909a(7) =13135165a(8) =-498874991a(9) =21838772377

External references