login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A003613 Number of symmetries in planted (1,4) trees on 3n-1 vertices.
(Formerly M4102)
0
1, 6, 12, 96, 1560, 4848, 28848, 248352, 1446240, 12905664, 99071040, 649236480, 4924099200, 49007023872, 304778309376, 2301818168832, 18389782387200, 138110895596544, 1094304243348480, 8691945066848256, 68039592521668608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Kathleen A. McKeon, The expected number of symmetries in locally-restricted trees I, pp. 849-860 of Y. Alavi et al., eds., Graph Theory, Combinatorics and Applications. Wiley, NY, 2 vols., 1991.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..21.

Kathleen A. McKeon, Letter to N. J. A. Sloane, July 25 1991

Kathleen A. McKeon, The expected number of symmetries in locally-restricted trees I, pp. 849-860 of Y. Alavi et al., eds., Graph Theory, Combinatorics and Applications. Wiley, NY, 2 vols., 1991. [Annotated scanned copy]

Index entries for sequences related to rooted trees

Index entries for sequences related to trees

CROSSREFS

Sequence in context: A128953 A181597 A002898 * A099767 A191462 A080450

Adjacent sequences:  A003610 A003611 A003612 * A003614 A003615 A003616

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mira Bernstein

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 14 12:21 EST 2019. Contains 329114 sequences. (Running on oeis4.)