55515: Near Repdigit 55..5515

First few terms (base 10): \[[5^*15_{10}]_n=\{15,515,5515,55515,555515,\ldots\}\]

General Formula:\[[5^*15_{10}]_n=5\cdot{100\cdot10^{n}-73\over9}\]

Equivalent Patterns: (none)

See Also: Factorization of 55..5515 on stdkmd.net

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