login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056388 Number of primitive (aperiodic) step shifted (decimated) sequences using exactly four different symbols. 1
0, 0, 0, 12, 60, 792, 1404, 10704, 31200, 204972, 349956, 3727128, 5065804, 41572908, 127198968, 517279416, 1041517620, 11195605728, 15012935676, 135825494568, 363040468328, 1746669815460, 3181465294092 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

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..23.

FORMULA

sum mu(d)*A056378(n/d) where d|n.

CROSSREFS

Sequence in context: A012707 A355671 A108096 * A056378 A231026 A333969

Adjacent sequences: A056385 A056386 A056387 * A056389 A056390 A056391

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 2 19:59 EST 2022. Contains 358510 sequences. (Running on oeis4.)