22722: Near Repdigit Palindrome 22..22722..22

First few terms (base 10): \[[2^*72^*_{10}]_n=\{7,272,22722,2227222,222272222,\ldots\}\]

General Formula:\[[2^*72^*_{10}]_n={20\cdot10^{2n}+45\cdot10^{n}-2\over9}\]

Equivalent Patterns: (none)

See Also: Factorization of 22..22722..22 on stdkmd.net

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