15553: Quasi Repdigit 155..553

First few terms (base 10): \[[15^*3_7]_n=\{10,87,626,4399,30810,\ldots\}\]

First few terms (base 7): \[\{\text{13},\text{153},\text{1553},\text{15553},\text{155553},\ldots\}\]

General Formula:\[[15^*3_7]_n={77\cdot7^{n}-17\over6}\]

Equivalent Patterns: (none)

Table

No table data.