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F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, <a href="httphttps://arxivwww.combinatorics.org/absojs/1907index09120php/eljc/article/view/v27i1p52/8039">Queens in exile: non-attacking queens on infinite chess boards</a>, arXivElectronic J. Combin., 27:19071 (2020), #P1.52.09120, July 2019
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All these conjectures are now theorems - see the Dekking et al. paper. - N. J. A. Sloane, Jul 22 2019
F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, <a href="http://arxiv.org/abs/1907.09120">Queens in exile: non-attacking queens on infinite chess boards</a>, arXiv:1907.09120, July 2019
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Conjecture: This sequence is 2.TTW(3,3,2) where TTW is the ternary tribonacci word defined in A080843, or equally it is THETA(3,3,2), where THETA is defined in A275925.. - N. J. A. Sloane, Mar 19 2019
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Conjecture: This sequence is 2.TTW(3,3,2) where TTW is the ternary tribonacci word defined in A080843, or equally it is THETA(3,3,2), where THETA is defined in A275925.. - N. J. A. Sloane, Mar 19 2019
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Conjecture: This sequence is 2.TTW(3,3,2) where TTW is the ternary tribonacci word defined in A080843. - N. J. A. Sloane, Mar 19 2019
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