15555: Near Repdigit 155..55

First few terms (base 10): \[[15^*_8]_n=\{1,13,109,877,7021,\ldots\}\]

First few terms (base 8): \[\{\text{1},\text{15},\text{155},\text{1555},\text{15555},\ldots\}\]

General Formula:\[[15^*_8]_n={12\cdot8^{n}-5\over7}\]

Equivalent Patterns: \[[3^*2_8]_n=2\cdot[15^*_8]_n\] \[[6^*4_8]_n=4\cdot[15^*_8]_n\]

Table

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