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A007222 Almost-convex polygons of perimeter 2n on square lattice.
(Formerly M5203)
0
28, 1468, 34680, 535452, 6302296, 61400920, 520788460, 3976323744, 27974148068, 184411212644, 1153389882896, 6908837566500, 39921952365008 (list; graph; refs; listen; history; text; internal format)
OFFSET
10,1
REFERENCES
I. G. Enting, A. J. Guttmann, L. B. Richmond and N. C. Wormald, Enumeration of almost-convex polygons on the square lattice, Random Structures Algorithms 3 (1992), 445-461.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
CROSSREFS
Sequence in context: A366302 A013926 A110696 * A209265 A042515 A042512
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 16 03:28 EDT 2024. Contains 371696 sequences. (Running on oeis4.)