187474domain: NAppears in sequencesG.f.: A(x) = exp( Sum_{n>=1} A(3^n*x)^n * x^n/n ).at n=5A159593Number of 3X3 0..n arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero.at n=12A187522