12228: Quasi Repdigit 122..228

First few terms (base 10): \[[12^*8_{10}]_n=\{18,128,1228,12228,122228,\ldots\}\]

General Formula:\[[12^*8_{10}]_n=2\cdot{55\cdot10^{n}+26\over9}\]

Equivalent Patterns: \[[61^*4_{10}]_n=[12^*8_{10}]_{n+1}/2\]

See Also: Factorization of 611..114 on stdkmd.net

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