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Related

fib-fibtophi

f(x,y,z):=5*fib(x)*fi...

f(10,20,15);

fibtophi(fib(x+y-z));

Calculate

fib

(fib(i)*fib(i+2017),i...

Calculate

fib

fib(-3);

Calculate

fib-true

d:a and b;

e:a and c;

f1:a and (not b) and ...

Calculate

fib-makelist

lucas(n) := fib(n-1) ...

a[0]: 1;

a[1]: 1;

Calculate

fib

fib(4020);

Calculate

fib

(fib(i)*fib(i+2017),i...

Calculate

fib-makelist

makelist(fib(i), i, 1...

Calculate

fib-sum

sum(fib(i)*fib(i+2017...

Calculate

fib

(fib(i)*fib(i+2017),i...

Calculate

fib

Run Example
(%i1)fib(n) ;
(%o1)                               fib(n)
(%i2) 
Run Example
fib(80);
(%o1)                          23416728348467685
(%i2) 
Run Example
fib(31);
(%o1)                               1346269
(%i2) 

Related Help

Help for Fib