77778: Near Repdigit 77..778

First few terms (base 10): \[[7^*8_9]_n=\{8,71,638,5741,51668,\ldots\}\]

First few terms (base 9): \[\{\text{8},\text{78},\text{778},\text{7778},\text{77778},\ldots\}\]

General Formula:\[[7^*8_9]_n={63\cdot9^{n}+1\over8}\]

Equivalent Patterns: \[[16^*7_9]_n=2\cdot[7^*8_9]_n\] \[[34^*5_9]_n=4\cdot[7^*8_9]_n\] \[[70^*1_9]_n=8\cdot[7^*8_9]_n\] \[[43^*4_9]_n=5\cdot[7^*8_9]_n\] \[[86^*8_9]_n=10\cdot[7^*8_9]_n\] \[[61^*2_9]_n=7\cdot[7^*8_9]_n\] \[[25^*6_9]_n=3\cdot[7^*8_9]_n\] \[[52^*3_9]_n=6\cdot[7^*8_9]_n\]

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