11711: Near Repdigit Palindrome 11..11711..11

First few terms (base 10): \[[1^*71^*_9]_n=\{7,145,7867,602245,48466927,\ldots\}\]

First few terms (base 9): \[\{\text{7},\text{171},\text{11711},\text{1117111},\text{111171111},\ldots\}\]

General Formula:\[[1^*71^*_9]_n={9\cdot9^{2n}+48\cdot9^{n}-1\over8}\]

Equivalent Patterns: (none)

Table

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