A132640 - OEIS

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A132640

Number of trees with n unlabeled nodes T(n) raised to power T(n).

1, 1, 1, 4, 27, 46656, 285311670611, 20880467999847912034355032910567, 3877924263464448622666648186154330754898344901344205917642325627886496385062863

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Number of trees with n unlabeled nodes: A000055.

Cf. A008973, A008974, A051674.

Sequence in context: A254866 A292968 A000869 * A307031 A306823 A174212

Adjacent sequences: A132637 A132638 A132639 * A132641 A132642 A132643

KEYWORD

nonn

AUTHOR

Omar E. Pol, Aug 24 2007

STATUS

approved