25558: Quasi Repdigit 255..558

First few terms (base 10): \[[25^*8_{10}]_n=\{28,258,2558,25558,255558,\ldots\}\]

General Formula:\[[25^*8_{10}]_n=2\cdot{115\cdot10^{n}+11\over9}\]

Equivalent Patterns: \[[51^*6_{10}]_n=2\cdot[25^*8_{10}]_n\]

See Also: Factorization of 255..558 on stdkmd.net

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