A056387 Number of primitive (aperiodic) step shifted (decimated) sequences using exactly three different symbols.

0, 0, 3, 21, 39, 285, 309, 1638, 3099, 14109, 17157, 135918, 130995, 789819, 1791447, 5425938, 8047839, 64463793, 64486017, 437310162, 871626729, 3136882659, 4278115101, 35355495078, 42359479599

Offset: 1

Author

Marks R. Nester

Keywords

• nonn

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]

Formula

Sum mu(d)*A056377(n/d) where d|n.