A056396 Number of step shifted (decimated) sequence structures using exactly two different symbols.

0, 1, 2, 5, 5, 19, 13, 47, 51, 139, 107, 623, 351, 1399, 2171, 4463, 4115, 22111, 14601, 68015, 88375, 209935, 190745, 1075199, 839127, 2796999, 3730583, 11276703, 9587579, 67195519, 35792567

Offset

1,3

Comments

See A056371 for an explanation of step shifts. 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

A056391(n)-1.

Crossrefs

Column 2 of A288620.

Cf. A056376.

Sequence in context: A154816 A367299 A140600 * A085043 A338586 A143818

Adjacent sequences: A056393 A056394 A056395 * A056397 A056398 A056399

Keyword

nonn

Author

Marks R. Nester

Status

approved