12111: Near Repdigit 1211..11

First few terms (base 10): \[[121^*_9]_n=\{11,100,901,8110,72991,\ldots\}\]

First few terms (base 9): \[\{\text{12},\text{121},\text{1211},\text{12111},\text{121111},\ldots\}\]

General Formula:\[[121^*_9]_n={89\cdot9^{n}-1\over8}\]

Equivalent Patterns: \[[242^*_9]_n=2\cdot[121^*_9]_n\] \[[484^*_9]_n=4\cdot[121^*_9]_n\] \[[363^*_9]_n=3\cdot[121^*_9]_n\]

Table

No table data.