15555: Near Repdigit 155..55

First few terms (base 10): \[[15^*_9]_n=\{1,14,131,1184,10661,\ldots\}\]

First few terms (base 9): \[\{\text{1},\text{15},\text{155},\text{1555},\text{15555},\ldots\}\]

General Formula:\[[15^*_9]_n={13\cdot9^{n}-5\over8}\]

Equivalent Patterns: \[[32^*1_9]_n=2\cdot[15^*_9]_{n+1}\] \[[64^*2_9]_n=4\cdot[15^*_9]_{n+1}\] \[[47^*6_9]_n=3\cdot[15^*_9]_{n+1}\]

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