A011789 Number of directed animals on a certain lattice.

1, 4, 22, 126, 748, 4532, 27853, 172965, 1082628, 6818768, 43163792, 274370868, 1750133503

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Crossrefs

Cf. A011790, A011791, A011792.

Sequence in context: A056625 A116428 A121187 * A047039 A100525 A199033

Adjacent sequences: A011786 A011787 A011788 * A011790 A011791 A011792

Keyword

nonn,more,obsc

Author

Alain Denise (Alain.Denise(AT)lri.fr)

Status

approved