A192074 a(n) = A066158(n)-2 with a(0)=1.

0, 0, 4, 16, 53, 172, 568, 1906, 6471, 22200, 76884, 268350, 942649, 3329606, 11817580, 42120338, 150682448, 540832272, 1946892840, 7027047846, 25424079337, 92185846606, 334925007126, 1219054432488, 4444545298877, 16229462702150, 59347661054362

Offset

1,3

Links

Table of n, a(n) for n=1..27.

Gadi Aleksandrowicz and Gill Barequet, Parallel Enumeration of Lattice Animals, in Frontiers in Algorithmics and Algorithmic Aspects in Information and Management, Lecture Notes in Computer Science, 2011, Volume 6681/2011, 90-99. See the table of A_2^(PT)(n).

Crossrefs

Cf. A066158, A006762, A192075, A192076, A192077.

Sequence in context: A074409 A056589 A074407 * A293884 A121159 A358232

Adjacent sequences: A192071 A192072 A192073 * A192075 A192076 A192077

Keyword

nonn

Author

N. J. A. Sloane, Jun 22 2011

Status

approved