**Expansion of 1/(sqrt(1-4x)-x^2).**

*1, 2, 7, 24, 87, 322, 1211, 4604, 17645, 68042, 263655, 1025632, 4002601*

*1 seqfan posts*

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

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