A056382 - OEIS

%I #6 Aug 22 2017 20:53:10

%S 3,6,15,45,69,381,387,1890,3393,14907,17799,139518,133101,798129,

%T 1804431,5452434,8072529,64596051,64573623,437717394,872156889,

%U 3138141621,4279259571,35361942282,42364514331

%N Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of three different symbols.

%C See A056371 for an explanation of step shifts.

%D 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]

%F Sum mu(d)*A056372(n/d) where d|n.

%K nonn

%O 1,1

%A _Marks R. Nester_