55855: Near Repdigit Palindrome 55..55855..55

First few terms (base 10): \[[5^*85^*_{10}]_n=\{8,585,55855,5558555,555585555,\ldots\}\]

General Formula:\[[5^*85^*_{10}]_n={50\cdot10^{2n}+27\cdot10^{n}-5\over9}\]

Equivalent Patterns: (none)

See Also: Factorization of 55..55855..55 on stdkmd.net

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