21112: Depression 211..112

First few terms (base 10): \[[21^*2_9]_n=\{20,173,1550,13943,125480,\ldots\}\]

First few terms (base 9): \[\{\text{22},\text{212},\text{2112},\text{21112},\text{211112},\ldots\}\]

General Formula:\[[21^*2_9]_n={153\cdot9^{n}+7\over8}\]

Equivalent Patterns: \[[42^*4_9]_n=2\cdot[21^*2_9]_n\] \[[84^*8_9]_n=4\cdot[21^*2_9]_n\] \[[63^*6_9]_n=3\cdot[21^*2_9]_n\]

Table

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