99499: Near Repdigit Palindrome 99..99499..99

First few terms (base 10): \[[9^*49^*_{10}]_n=\{4,949,99499,9994999,999949999,\ldots\}\]

General Formula:\[[9^*49^*_{10}]_n=10\cdot10^{2n}-5\cdot10^{n}-1\]

Equivalent Patterns: (none)

See Also: Factorization of 99..99499..99 on stdkmd.net

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