A056388 Number of primitive (aperiodic) step shifted (decimated) sequences using exactly four different symbols.

0, 0, 0, 12, 60, 792, 1404, 10704, 31200, 204972, 349956, 3727128, 5065804, 41572908, 127198968, 517279416, 1041517620, 11195605728, 15012935676, 135825494568, 363040468328, 1746669815460, 3181465294092

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