HP-17BII+ serial

[Don Shepherd]

(02-03-2016 01:51 AM)Elwin Wrote:  

(02-02-2016 09:25 AM)Elwin Wrote:  I did some tests with my silver 17BII+ and found something that allows you access all the numbers in the sequence while still iterating twice each time it runs.

RAN#=L(A:FP(9821xSEED+.211327))+0xL(SEED:G(A))

The first iteration is stored in RAN# and the second iteration is stored in SEED. Solving for RAN# a second time produces the third and fourth numbers in the sequence.

Nothing changes if you multiply the first L() by 0 instead of the second.

I haven't been able to figure out why it works this way.

As it turns out you can get the same results by just removing the G() from the original equation.

So RAN#=L(SEED:FP(9821xG(SEED)+.211327)) becomes
RAN#=L(SEED:FP(9821xSEED+.211327)) and the first number is stored in RAN# and the second number is stored in SEED.

But if you change G(SEED) to SEED, then SEED will appear in the displayed menu, which will allow the user to change it, and that may not be what you want.