55755: Near Repdigit Palindrome 55..55755..55

First few terms (base 10): \[[5^*75^*_8]_n=\{7,381,23533,1498989,95877997,\ldots\}\]

First few terms (base 8): \[\{\text{7},\text{575},\text{55755},\text{5557555},\text{555575555},\ldots\}\]

General Formula:\[[5^*75^*_8]_n={40\cdot8^{2n}+14\cdot8^{n}-5\over7}\]

Equivalent Patterns: (none)

Table

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