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Multiplicity of the zero at x=1 of the characteristic polynomial P_n^{C0+}.
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%I #23 Aug 13 2020 12:17:18

%S 1,2,2,3,3,5,5,8,9,14,16,26,31,49,64,99,133,209,291,455,657,1022,1510,

%T 2359,3545,5536,8442,13201,20319,31836,49353,77436,120711,189674,

%U 296854,467160,733363,1155647,1818594,2869378,4524081,7146483

%N Multiplicity of the zero at x=1 of the characteristic polynomial P_n^{C0+}.

%C Appears to duplicate A129526. - _R. J. Mathar_, Sep 22 2014

%H A. R. Ashrafi, J. Azarija, K. Fathalikhani, S. Klavzar, et al., <a href="http://www.fmf.uni-lj.si/~klavzar/preprints/Fib-Luc-orbits-August-11-2014.pdf">Orbits of Fibonacci and Lucas cubes, dihedral transformations, and asymmetric strings</a>, 2014.

%H M. Assis, J. L. Jacobsen, I. Jensen, J.-M. Maillard and B. M. McCoy, <a href="http://arxiv.org/abs/1406.5566">Integrability vs non-integrability: Hard hexagons and hard squares compared</a>, arXiv preprint 1406.5566 [math-ph], 2014. See Eq. A.15.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Sep 18 2014

%E The initial terms look wrong to me. I have written to the authors.