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

*1, 1, 1, 2, 5, 13, 35, 97, 275, 794, 2327, 6905, 20705, 62642, 190987, 586219*

*2 seqfan posts*

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

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