**Coefficients of 1/sqrt(1-10*x+9*x^2); also, a(n) is the central coefficient of (1+5*x+4*x^2)^n.**

*1, 5, 33, 245, 1921, 15525, 127905, 1067925, 9004545, 76499525, 653808673*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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