11411: Near Repdigit Palindrome 11..11411..11

First few terms (base 10): \[[1^*41^*_{10}]_n=\{4,141,11411,1114111,111141111,\ldots\}\]

General Formula:\[[1^*41^*_{10}]_n={10\cdot10^{2n}+27\cdot10^{n}-1\over9}\]

Equivalent Patterns: \[[2^*82^*_{10}]_n=2\cdot[1^*41^*_{10}]_n\]

See Also: Factorization of 11..11411..11 on stdkmd.net

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