20007: Quasi Repdigit 200..007

First few terms (base 10): \[[20^*7_9]_n=\{25,169,1465,13129,118105,\ldots\}\]

First few terms (base 9): \[\{\text{27},\text{207},\text{2007},\text{20007},\text{200007},\ldots\}\]

General Formula:\[[20^*7_9]_n=18\cdot9^{n}+7\]

Equivalent Patterns: (none)

Table

No table data.