28332domain: NAppears in sequencesa(n) = floor(10000*log(n)).at n=16A004243a(n) = 10000*log(n) rounded to nearest integer.at n=16A004244Number of obtuse isosceles triangles on a centered hexagonal grid of size n.at n=8A241230Expansion of g.f. A(x) satisfying 0 = Sum_{n=-oo..+oo} x^n * A(x)^n * (4 - x^(n-1))^(n+1).at n=5A366734