44744: Near Repdigit Palindrome 44..44744..44

First few terms (base 10): \[[4^*74^*_8]_n=\{7,316,18916,1199908,76708132,\ldots\}\]

First few terms (base 8): \[\{\text{7},\text{474},\text{44744},\text{4447444},\text{444474444},\ldots\}\]

General Formula:\[[4^*74^*_8]_n={32\cdot8^{2n}+21\cdot8^{n}-4\over7}\]

Equivalent Patterns: (none)

Table

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