Benedict Irwin edited The 21 thing.tex  over 9 years ago

Commit id: f44f15aa2c46c138779422b775b908bc615daf7c

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Each sequence seems individual and fascinating. Everything seems to have a factor of $3$,$7$. However our old friends $9091$ and $9901$ appear very soon into the sequence at $n=5,6$, funnily enough begin $10,12$ divided by two, which were the $11...$ sequences positions. Also $5882353$ makes an appearence at $8$ which is $16$ by two, $16$ begin the $111...$ sequence counterpart.  Equally our friend friendly primes and combinations thereof can be expressed  \begin{equation} 101 = \frac{(21;;2)}{(21;;1)} \\  13×37 = 481 = \frac{(21;;2)^2}{(21;;1)} \\  9901 = \frac{(21;;1)(21;;6)}{(21;;2)(21;;3)}  \end{equation}