77477: Near Repdigit Palindrome 77..77477..77

First few terms (base 10): \[[7^*47^*_9]_n=\{4,610,51424,4182910,338973244,\ldots\}\]

First few terms (base 9): \[\{\text{4},\text{747},\text{77477},\text{7774777},\text{777747777},\ldots\}\]

General Formula:\[[7^*47^*_9]_n={63\cdot9^{2n}-24\cdot9^{n}-7\over8}\]

Equivalent Patterns: (none)

Table

No table data.