116344domain: NAppears in sequencesE.g.f.: -log(1 - (1 - sqrt(5 - 4*exp(x)) )/2 ).at n=6A118792Number of 3X3 0..n arrays with each 2X2 subblock determinant nonzero and the array of 2X2 subblock determinants symmetric under 90 degree rotation.at n=14A187529