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

First few terms (base 10): \[[6^*16^*_7]_n=\{1,307,16561,821827,40341601,\ldots\}\]

First few terms (base 7): \[\{\text{1},\text{616},\text{66166},\text{6661666},\text{666616666},\ldots\}\]

General Formula:\[[6^*16^*_7]_n=7\cdot7^{2n}-5\cdot7^{n}-1\]

Equivalent Patterns: (none)

Table

No table data.