A007193 Number of strict n-node animals on cubic lattice. (Formerly M4249)

1, 6, 45, 365, 3101, 27144, 242636, 2202873, 20241055, 187766940, 1755409652, 16517284570, 156265005369, 1485269469971, 14174126304850, 135741870538293, 1303996171096108, 12561249340326373, 121298814197201725

Offset

1,2

References

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=1..19.

I. Dutour, Animaux dirigés et approximations de séries génératrices, Mémoire de DEA, 1992, Université Bordeaux I.

Isabelle Dutour, Animaux dirigés et approximations de séries génératrices, Mémoire de DEA, 1992, Université Bordeaux I [Cached copy, no title pages, included with permission. Source for sequences A006193, A007193-A007199]

G. S. Joyce, On the Dhar directed-site animals-enumeration problem for the simple cubic lattice, J Phys A: Math Gen 22 (1989) vol. 19, L919-L924 [Gives 24 terms]

Crossrefs

Cf. A006193, A007193, A007194, A007195, A007196, A007197, A007198, A007199.

Sequence in context: A004988 A257633 A371779 * A153399 A007194 A025551

Adjacent sequences: A007190 A007191 A007192 * A007194 A007195 A007196

Keyword

nonn

Author

Simon Plouffe

Extensions

More terms from R. J. Mathar, Oct 21 2007

Status

approved