A199140 Number of assembly graphs with n rigid vertices and no crossings.

3, 9, 43, 217, 1328, 19700

Offset

2,1

Comments

See Burns et al. links for precise definition.

Links

Table of n, a(n) for n=2..7.

Jonathan Burns, Assembly Graph Words - Single Transverse Component (Counts).

Jonathan Burns, Egor Dolzhenko, Natasa Jonoska, Tilahun Muche, and Masahico Saito, Four-Regular Graphs with Rigid Vertices Associated to DNA Recombination, Discrete Applied Mathematics, Volume 161, Issues 10-11, July 2013, Pages 1378-1394.

Crossrefs

Sequence in context: A018427 A377062 A275781 * A154606 A369387 A232216

Adjacent sequences: A199137 A199138 A199139 * A199141 A199142 A199143

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 03 2011

Status

approved