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A011789 Number of directed animals on a certain lattice. 0
1, 4, 22, 126, 748, 4532, 27853, 172965, 1082628, 6818768, 43163792, 274370868, 1750133503 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A056625 A116428 A121187 * A047039 A100525 A199033

Adjacent sequences:  A011786 A011787 A011788 * A011790 A011791 A011792

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified September 28 21:22 EDT 2021. Contains 347717 sequences. (Running on oeis4.)