21222: Near Repdigit 2122..22

First few terms (base 10): \[[212^*_3]_n=\{7,23,71,215,647,\ldots\}\]

First few terms (base 3): \[\{\text{21},\text{212},\text{2122},\text{21222},\text{212222},\ldots\}\]

General Formula:\[[212^*_3]_n=8\cdot3^{n}-1\]

Equivalent Patterns: (none)

Table

No table data.