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A056376 Number of step shifted (decimated) sequences using exactly two different symbols. 5
0, 2, 4, 10, 10, 38, 26, 94, 102, 278, 214, 1246, 702, 2798, 4342, 8926, 8230, 44222, 29202, 136030, 176750, 419870, 381490, 2150398, 1678254, 5593998, 7461166, 22553406, 19175158, 134391038, 71585134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A056371 for an explanation of step shifts.

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

A056371(n)-2.

CROSSREFS

Cf. A056371.

Sequence in context: A097211 A092945 A320150 * A185372 A186757 A184876

Adjacent sequences:  A056373 A056374 A056375 * A056377 A056378 A056379

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

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Last modified November 13 16:08 EST 2019. Contains 329106 sequences. (Running on oeis4.)