45557: Quasi Repdigit 455..557

First few terms (base 10): \[[45^*7_{10}]_n=\{47,457,4557,45557,455557,\ldots\}\]

General Formula:\[[45^*7_{10}]_n={410\cdot10^{n}+13\over9}\]

Equivalent Patterns: \[[91^*4_{10}]_n=2\cdot[45^*7_{10}]_n\]

See Also: Factorization of 455..557 on stdkmd.net

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