login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056483 Number of primitive (aperiodic) palindromic structures using exactly four different symbols. 2
0, 0, 0, 0, 0, 0, 1, 1, 10, 10, 65, 65, 350, 349, 1701, 1700, 7770, 7760, 34105, 34095, 145749, 145685, 611501, 611435, 2532530, 2532180, 10391735, 10391395, 42355950, 42354239, 171798901 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

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

A056478(n)-A056477(n).

CROSSREFS

Column 4 of A284826.

Cf. A056465.

Sequence in context: A106789 A270012 A219911 * A056473 A241869 A243126

Adjacent sequences:  A056480 A056481 A056482 * A056484 A056485 A056486

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 April 5 16:53 EDT 2020. Contains 333245 sequences. (Running on oeis4.)