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A014559
Erroneous version of A001168.
0
1, 2, 6, 19, 53, 216, 760, 2725, 9910, 39446, 125268
OFFSET
0,2
REFERENCES
D. H. Riedelmeier, Counting polyominoes: yet another attack, Discrete Math., 36, 191-203, 1981.
CROSSREFS
Sequence in context: A192712 A214948 A192713 * A192714 A027098 A183305
KEYWORD
dead
STATUS
approved