22227: Near Repdigit 22..227

First few terms (base 10): \[[2^*7_9]_n=\{7,25,187,1645,14767,\ldots\}\]

First few terms (base 9): \[\{\text{7},\text{27},\text{227},\text{2227},\text{22227},\ldots\}\]

General Formula:\[[2^*7_9]_n={9\cdot9^{n}+19\over4}\]

Equivalent Patterns: (none)

Table

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