99199: Near Repdigit Palindrome 99..99199..99

First few terms (base 10): \[[9^*19^*_{10}]_n=\{1,919,99199,9991999,999919999,\ldots\}\]

General Formula:\[[9^*19^*_{10}]_n=10\cdot10^{2n}-8\cdot10^{n}-1\]

Equivalent Patterns: (none)

See Also: Factorization of 99..99199..99 on stdkmd.net

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