181584domain: NAppears in sequencesNumber of (n+1) X 2 0..1 arrays with the permanents of 2 X 2 subblocks nondecreasing rightwards and downwards.at n=9A204716The Wiener index of the cyclic phenylene with n hexagons (n>=3).at n=23A224456G.f.: Sum_{n>=0} ( (1+x)^n - 1 )^n * 4^n / (5 - 4*(1+x)^n)^(n+1).at n=4A317664