66166: Near Repdigit Palindrome 66..66166..66

First few terms (base 10): \[[6^*16^*_9]_n=\{1,501,43881,3583581,290532561,\ldots\}\]

First few terms (base 9): \[\{\text{1},\text{616},\text{66166},\text{6661666},\text{666616666},\ldots\}\]

General Formula:\[[6^*16^*_9]_n={27\cdot9^{2n}-20\cdot9^{n}-3\over4}\]

Equivalent Patterns: (none)

Table

No table data.