A056396 - OEIS

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

%S 0,1,2,5,5,19,13,47,51,139,107,623,351,1399,2171,4463,4115,22111,

%T 14601,68015,88375,209935,190745,1075199,839127,2796999,3730583,

%U 11276703,9587579,67195519,35792567

%N Number of step shifted (decimated) sequence structures using exactly two different symbols.

%C See A056371 for an explanation of step shifts. Permuting the symbols will not change the structure.

%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 A056391(n)-1.

%Y Column 2 of A288620.

%Y Cf. A056376.

%K nonn

%O 1,3

%A _Marks R. Nester_