21222: Near Repdigit 2122..22

First few terms (base 10): \[[212^*_4]_n=\{9,38,154,618,2474,\ldots\}\]

First few terms (base 4): \[\{\text{21},\text{212},\text{2122},\text{21222},\text{212222},\ldots\}\]

General Formula:\[[212^*_4]_n={29\cdot4^{n}-2\over3}\]

Equivalent Patterns: (none)

Table

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