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A291877 Consider the graph with one central vertex connected to three outer vertices (a star graph). Then, a(n) is the minimum number of moves required to transfer a stack of n discs from the central vertex to an outer vertex, moving discs to adjacent vertices, following the rules of the Towers of Hanoi. 1
1, 4, 7, 14, 23, 32, 47, 68, 93, 120, 153, 198, 255, 318, 399, 480, 579, 700, 835, 1012, 1201, 1428 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

Caroline Holz auf der Heide. Distances and automatic sequences in distinguished variants of Hanoi graphs. Dissertation. Fakultät für Mathematik, Informatik und Statistik. Ludwig-Maximilians-Universität München, 2016. [See Chapter 3.]

Paul K. Stockmeyer, Variations on the Four-Post Tower of Hanoi Puzzle, Congr. Numer., 102 (1994), pp. 3-12.

Eric Weisstein's World of Mathematics, Star Graph

Index entries for sequences related to Towers of Hanoi

CROSSREFS

Cf. A291876.

Sequence in context: A146678 A146417 A008370 * A048241 A003404 A139025

Adjacent sequences:  A291874 A291875 A291876 * A291878 A291879 A291880

KEYWORD

nonn,hard,more

AUTHOR

Eric M. Schmidt, Sep 04 2017

EXTENSIONS

Clarified definition and a(16)-a(18) added by Borut Lužar, Dec 11 2017

a(19)-a(21) by Borut Lužar, Mar 07 2019

a(22) added by Ciril Petr, Jun 22 2021

STATUS

approved

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Last modified July 24 23:25 EDT 2021. Contains 346273 sequences. (Running on oeis4.)