11311: Near Repdigit Palindrome 11..11311..11

First few terms (base 10): \[[1^*31^*_8]_n=\{3,89,4809,300617,19182153,\ldots\}\]

First few terms (base 8): \[\{\text{3},\text{131},\text{11311},\text{1113111},\text{111131111},\ldots\}\]

General Formula:\[[1^*31^*_8]_n={8\cdot8^{2n}+14\cdot8^{n}-1\over7}\]

Equivalent Patterns: \[[2^*62^*_8]_n=2\cdot[1^*31^*_8]_n\]

Table

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