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A056377 Number of step shifted (decimated) sequences using exactly three different symbols. 2
0, 0, 3, 21, 39, 288, 309, 1659, 3102, 14148, 17157, 136227, 130995, 790128, 1791489, 5427597, 8047839, 64467180, 64486017, 437324331, 871627041, 3136899816, 4278115101, 35355632943, 42359479638 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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..25.

FORMULA

A056372(n)-3*A056371(n)+3.

CROSSREFS

Cf. A056372.

Sequence in context: A298035 A178082 A056387 * A146712 A318549 A217000

Adjacent sequences:  A056374 A056375 A056376 * A056378 A056379 A056380

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

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Last modified November 17 00:08 EST 2019. Contains 329209 sequences. (Running on oeis4.)