Expansion of the exponential series exp( x R(x) ) = exp((1 + x - sqrt(1 - 2 x - 3x^2))/(2(1 + x))), where R(x) is the ordinary generating series of the Riordan numbers A005043.

A080895

Expansion of the exponential series exp( x R(x) ) = exp((1 + x - sqrt(1 - 2 x - 3x^2))/(2(1 + x))), where R(x) is the ordinary generating series of the Riordan numbers A005043.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =7a(4) =49a(5) =541a(6) =7321a(7) =122011a(8) =2390977a(9) =54027289a(10) =1382140081a(11) =39493358191

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