33331: Near Repdigit 33..331

First few terms (base 10): \[[3^*1_{10}]_n=\{1,31,331,3331,33331,\ldots\}\]

General Formula:\[[3^*1_{10}]_n={10\cdot10^{n}-7\over3}\]

Equivalent Patterns: \[[9^*3_{10}]_n=3\cdot[3^*1_{10}]_n\] \[[6^*2_{10}]_n=2\cdot[3^*1_{10}]_n\]

See Also: Factorization of 33..331 on stdkmd.net

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