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
Mon Mar 28 02:02:00 CEST 2011 [seqfan] Re: Problem with consistency of A086581 - resolution