40009: Quasi Repdigit 400..009

First few terms (base 10): \[[40^*9_{10}]_n=\{49,409,4009,40009,400009,\ldots\}\]

General Formula:\[[40^*9_{10}]_n=40\cdot10^{n}+9\]

Equivalent Patterns: (none)

See Also: Factorization of 400..009 on stdkmd.net

Table

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