77177: Near Repdigit Palindrome 77..77177..77

First few terms (base 10): \[[7^*17^*_9]_n=\{1,583,51181,4180723,338953561,\ldots\}\]

First few terms (base 9): \[\{\text{1},\text{717},\text{77177},\text{7771777},\text{777717777},\ldots\}\]

General Formula:\[[7^*17^*_9]_n={63\cdot9^{2n}-48\cdot9^{n}-7\over8}\]

Equivalent Patterns: (none)

Table

No table data.