A221157 Number of compositions of the grid graph G_{4,n}.

8, 456, 27780, 1691690, 103015508, 6273056950, 381992581548, 23261112447444, 1416465537909008, 86254456382365422, 5252391281433321840, 319839870650458477666, 19476375116903366115612, 1185997189541765630381252, 72220283556802506132778356, 4397792341346509099717980618, 267799799794395524429805470412, 16307439552264147863293668460374

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Frank Simon, Algebraic Methods for Computing the Reliability of Networks, Dissertation, Doctor Rerum Naturalium (Dr. rer. nat.), Fakultät Mathematik und Naturwissenschaften der Technischen Universität Dresden, 2012.

Crossrefs

Cf. A108808, A145835.

Sequence in context: A209840 A187049 A367707 * A015006 A279383 A054326

Adjacent sequences: A221154 A221155 A221156 * A221158 A221159 A221160

Keyword

nonn

Author

N. J. A. Sloane, Jan 04 2013

Status

approved