1,3

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

2^[(n+1)/2]-2.

Cf. A016116, A000918.

Sequence in context: A139550 A060549 A120690 this_sequence A034422 A071908 A011260

Adjacent sequences: A056450 A056451 A056452 this_sequence A056454 A056455 A056456

nonn

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