15557: Quasi Repdigit 155..557

First few terms (base 10): \[[15^*7_9]_n=\{16,133,1186,10663,95956,\ldots\}\]

First few terms (base 9): \[\{\text{17},\text{157},\text{1557},\text{15557},\text{155557},\ldots\}\]

General Formula:\[[15^*7_9]_n={117\cdot9^{n}+11\over8}\]

Equivalent Patterns: \[[32^*5_9]_n=2\cdot[15^*7_9]_n\] \[[81^*8_9]_n=5\cdot[15^*7_9]_n\]

Table

No table data.