A056380 Number of step shifted (decimated) sequences using exactly six different symbols.

0, 0, 0, 0, 0, 360, 2520, 48060, 317520, 4109040, 12923136, 238785300, 559279980, 7612396920, 37864711260, 246263046840, 787758864480, 13282478342640, 27723264985920, 387585098313300, 1595144664456720

Offset

1,6

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..21.

Formula

A056375(n)-6*A056374(n)+15*A056373(n)-20*A056372(n)+15*A056371(n)-6.

Crossrefs

Cf. A056375.

Sequence in context: A236991 A205514 A056390 * A234555 A234550 A024185

Adjacent sequences: A056377 A056378 A056379 * A056381 A056382 A056383

Keyword

nonn

Author

Marks R. Nester

Status

approved