1,5

Turning over the necklace is not allowed.

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.

A001869(n)-5*A001868(n)+10*A001867(n)-10*A000031(n)+5.

Cf. A001869.

Sequence in context: A128598 A073990 A056290 this_sequence A010976 A100130 A014103

Adjacent sequences: A056282 A056283 A056284 this_sequence A056286 A056287 A056288

nonn

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)