Density conjecture for modular Stanley sequences

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Let S(0)=(sn)S(0)=(s_n) be the Stanley sequence generated by {0}\{0\}. A modular sequence S(A)=(an)S(A)=(a_n) is denser than S(0)S(0) eventually if its terms satisfy an<sna_n<s_n for all sufficiently large nn.

Density conjecture. There exists a modular sequence S(A)=(an)S(A)=(a_n) such that

an<sna_n<s_n

for all sufficiently large nn.

The paper exhibits a modular sequence with this inequality for infinitely many nn, but no example satisfying it eventually is known there.

References

Primary source

Richard A. Moy and David Rolnick, “Novel structures in Stanley sequences”, arXiv:1502.06013 (2015).

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