%I #10 Oct 07 2017 03:09:33

%S 1,8,60,440,3230,23688,173796,1275240,9359748,68708320,504466468,

%T 3704376384,27205146592

%N Number of rooted 2-dimensional polyominoes with n octagonal cells, with no symmetries removed.

%D Dan Hoey, Bill Gosper and Richard C. Schroeppel, Discussions in Math-Fun Mailing list, circa Jul 13 1999.

%H Daniel J. Heath and R. Robert Rdyberg, III, <a href="https://dx.doi.org/10.4169/math.mag.90.2.135">On Polyominoes and Digital Cameras</a>, Mathematics Magazine, Vol. 90, No. 2 (April 2017), pp. 135-141.

%H R. C. Schroeppel, <a href="http://www.experimentalmath.info/workshop2004/schroeppel-talk.pdf">A few mathematical experiments</a>

%Y A row of A094166.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, May 06 2004