99997: Near Repdigit 99..997

First few terms (base 10): \[[9^*7_{10}]_n=\{7,97,997,9997,99997,\ldots\}\]

General Formula:\[[9^*7_{10}]_n=10\cdot10^{n}-3\]

Equivalent Patterns: \[[29^*1_{10}]_n=3\cdot[9^*7_{10}]_n\] \[[19^*4_{10}]_n=2\cdot[9^*7_{10}]_n\]

See Also: Factorization of 99..997 on stdkmd.net

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