Asymptotic ratio of non-primonumerophobic and digit-pattern sequences
Asymptotic ratio of non-primonumerophobic and digit-pattern sequences
Let denote the number of non-primonumerophobic digit patterns of length , and let denote the total number of available digit patterns of length . Asymptotic ratio conjecture. As , the ratio of these sequences satisfies
The preceding combinatorial estimate yields the same asymptotic expression heuristically, but the supplied source does not establish the corresponding asymptotic for the exact sequences.
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Sources & referencesView supporting material
Primary source
Dmytro S. Inosov and Emil Vlasák, “Cryptarithmically unique terms in integer sequences”, arXiv:2410.21427 (2025).
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