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A055544 Total number of nodes in all rooted trees with n nodes. 4
1, 2, 6, 16, 45, 120, 336, 920, 2574, 7190, 20262, 57192, 162318, 461622, 1317165, 3766096, 10792399, 30980862, 89084844, 256524560, 739658472, 2135213982, 6170505665, 17849399616, 51679366125, 149750549260, 434260826883 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Index entries for sequences related to rooted trees

Eric Weisstein's World of Mathematics, Graph Edge

FORMULA

a(n) = n*A000081(n).

CROSSREFS

Cf. A000081, A000169, A055543, A055544.

Sequence in context: A026134 A105696 A074413 * A126285 A026163 A005717

Adjacent sequences:  A055541 A055542 A055543 * A055545 A055546 A055547

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com)

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Last modified February 16 07:10 EST 2012. Contains 205874 sequences.