# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/

Search: id:a056318
Showing 1-1 of 1

%I A056318 #6 Aug 22 2017 20:53:08
%S A056318 0,1,4,7,18,29,70,126,266,507,1054,2037,4158,8183,16488,32760,65790,
%T A056318 131026,262654,524265,1049524,2097119,4196350,8388450,16781292,
%U A056318 33554367,67116784,134217657,268451838
%N A056318 Number of primitive (aperiodic) reversible strings with n beads using exactly two different colors.
%C A056318 A string and its reverse are considered to be equivalent. Identical to A045625 for n>1.
%D A056318 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 A056318 Sum mu(d)*A056309(n/d) where d|n.
%Y A056318 Cf. A045625.
%K A056318 nonn
%O A056318 1,3
%A A056318 _Marks R. Nester_

# Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE