More series, and IFF, if and only if....

*please note: these tables begin with F(n) : F1 is 0, F2 is 1, F3 is 1, F2 is 2, etc. Most other websites begin with F0 is 0, F1 is 1, F2 is 2 etc. Therefore my calculations are one out.
Please note
There is an error in addition in F81. It should be 23 416 728 348 467 685
and also in F99. It should be 135 301 852 344 706 746 049.
All the nearby numbers need correction also.



What is signifant about 192?

Here is the equation:- F(n) x 192/100000 = F(n-13) metres
which is the length of each row or edge iff 1000 stitches measure 192 cm.



I have begun an ambitious model, F21 = 6765, already completed, for a seashell, next row will be 10946 stitches, if I can bear to finish it.
I wondered how long is this edge, so I measured 1000 stitches and it was about 208cm.
192 cm is very close to 208.

More next time, my time on library computer is up.