12111: Near Repdigit 1211..11

First few terms (base 10): \[[121^*_{10}]_n=\{12,121,1211,12111,121111,\ldots\}\]

General Formula:\[[121^*_{10}]_n={109\cdot10^{n}-1\over9}\]

Equivalent Patterns: \[[363^*_{10}]_n=3\cdot[121^*_{10}]_n\] \[[242^*_{10}]_n=2\cdot[121^*_{10}]_n\] \[[484^*_{10}]_n=4\cdot[121^*_{10}]_n\]

See Also: Factorization of 1211..11 on stdkmd.net

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