11611: Near Repdigit Palindrome 11..11611..11

First few terms (base 10): \[[1^*61^*_7]_n=\{6,92,3046,138972,6737606,\ldots\}\]

First few terms (base 7): \[\{\text{6},\text{161},\text{11611},\text{1116111},\text{111161111},\ldots\}\]

General Formula:\[[1^*61^*_7]_n={7\cdot7^{2n}+30\cdot7^{n}-1\over6}\]

Equivalent Patterns: (none)

Table

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