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A055543 Total number of nodes in all trees with n nodes. 3
1, 2, 3, 8, 15, 36, 77, 184, 423, 1060, 2585, 6612, 16913, 44226, 116115, 309120, 826693, 2229606, 6041145, 16461300, 45034605, 123722632, 341045702, 943197528, 2615922250, 7274629700, 20278767420, 56656404896, 158617430965 (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 trees

FORMULA

a(n) = n*A000055(n).

CROSSREFS

Cf. A000055, A000169, A055542, A055544.

Sequence in context: A166920 A080206 A132862 * A049957 A151255 A147999

Adjacent sequences:  A055540 A055541 A055542 * A055544 A055545 A055546

KEYWORD

nonn,easy

AUTHOR

Eric Weisstein (eric(AT)weisstein.com)

EXTENSIONS

More terms, formula from Christian G. Bower (bowerc(AT)usa.net), Jun 12 2000

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Last modified February 17 05:54 EST 2012. Contains 205985 sequences.