31111: Near Repdigit 311..11

First few terms (base 10): \[[31^*_{10}]_n=\{3,31,311,3111,31111,\ldots\}\]

General Formula:\[[31^*_{10}]_n={28\cdot10^{n}-1\over9}\]

Equivalent Patterns: \[[93^*_{10}]_n=3\cdot[31^*_{10}]_n\] \[[15^*_{10}]_n=5\cdot[31^*_{10}]_{n-1}\] \[[62^*_{10}]_n=2\cdot[31^*_{10}]_n\] \[[7^*5_{10}]_n=25\cdot[31^*_{10}]_{n-1}\] \[[46^*5_{10}]_n=15\cdot[31^*_{10}]_n\]

See Also: Factorization of 311..11 on stdkmd.net

Table

No table data.