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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; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..29.

Eric Weisstein's World of Mathematics, Graph Vertex.

Index entries for sequences related to trees

FORMULA

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

CROSSREFS

Cf. A000055, A000169, A055542, A055544.

Sequence in context: A242510 A080206 A132862 * A308433 A049957 A151255

Adjacent sequences:  A055540 A055541 A055542 * A055544 A055545 A055546

KEYWORD

nonn,easy

AUTHOR

Eric W. Weisstein

EXTENSIONS

More terms, formula from Christian G. Bower, Jun 12 2000

STATUS

approved

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Last modified August 21 19:04 EDT 2019. Contains 326168 sequences. (Running on oeis4.)