11311: Near Repdigit Palindrome 11..11311..11

First few terms (base 10): \[[1^*31^*_{10}]_n=\{3,131,11311,1113111,111131111,\ldots\}\]

General Formula:\[[1^*31^*_{10}]_n={10\cdot10^{2n}+18\cdot10^{n}-1\over9}\]

Equivalent Patterns: \[[3^*93^*_{10}]_n=3\cdot[1^*31^*_{10}]_n\] \[[2^*62^*_{10}]_n=2\cdot[1^*31^*_{10}]_n\]

See Also: Factorization of 11..11311..11 on stdkmd.net

Table

No table data.