A056483 Number of primitive (aperiodic) palindromic structures using exactly four different symbols.

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

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