16668: Quasi Repdigit 166..668

First few terms (base 10): \[[16^*8_9]_n=\{17,143,1277,11483,103337,\ldots\}\]

First few terms (base 9): \[\{\text{18},\text{168},\text{1668},\text{16668},\text{166668},\ldots\}\]

General Formula:\[[16^*8_9]_n={63\cdot9^{n}+5\over4}\]

Equivalent Patterns: \[[34^*7_9]_n=2\cdot[16^*8_9]_n\] \[[70^*5_9]_n=4\cdot[16^*8_9]_n\] \[[52^*6_9]_n=3\cdot[16^*8_9]_n\]

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