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A259467
Erroneous version of A003092.
0
1, 2, 36, 1200, 57000, 3477600, 157826240
OFFSET
1,2
REFERENCES
E. M. Palmer and R. C. Read, on the number of plane 2-trees, J. Lond. Math. Soc., 6 (1973), 583-592.
LINKS
E. M. Palmer and R. C. Read, On the number of plane 2-trees, J. Lond. Math. Soc., 6 (1973), 583-592. [Annotated and corrected scanned copy]
CROSSREFS
Sequence in context: A305596 A210899 A302903 * A003092 A187535 A263421
KEYWORD
dead
STATUS
approved