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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056482 Number of primitive (aperiodic) palindromic structures using exactly three different symbols. 2
0, 0, 0, 0, 1, 1, 6, 6, 25, 24, 90, 89, 301, 295, 965, 960, 3025, 2999, 9330, 9305, 28495, 28411, 86526, 86430, 261624, 261324, 788945, 788669, 2375101, 2374110, 7141686 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

Permuting the symbols will not change the structure.

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]

LINKS

Table of n, a(n) for n=1..31.

FORMULA

A056477(n)-A056476(n).

CROSSREFS

Column 3 of A284826.

Cf. A056464.

Sequence in context: A087236 A219910 A077193 * A255466 A286482 A123874

Adjacent sequences:  A056479 A056480 A056481 * A056483 A056484 A056485

KEYWORD

nonn

AUTHOR

Marks R. Nester

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 July 23 00:43 EDT 2019. Contains 325228 sequences. (Running on oeis4.)