A056384 - OEIS

A056384

Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of five different symbols.

5, 20, 70, 350, 820, 8030, 13170, 102750, 327050, 2444780, 4884430, 61632150, 101732420, 1017309930, 3816214730, 19104506250, 47683838320, 635787430450, 1059638680670, 11924777944650, 39736963208630

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

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

Sum mu(d)*A056374(n/d) where d|n.

CROSSREFS

Sequence in context: A243869 A154638 A054889 * A369818 A036683 A054444

Adjacent sequences: A056381 A056382 A056383 * A056385 A056386 A056387

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved