66661: Near Repdigit 66..661
First few terms (base 10): \[[6^*1_{10}]_n=\{1,61,661,6661,66661,\ldots\}\]
General Formula:\[[6^*1_{10}]_n={20\cdot10^{n}-17\over3}\]
Equivalent Patterns: (none)
See Also: Factorization of 66..661 on stdkmd.net
Table
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