Arithmetic Sequence Calculator
definition: an = a1 + f × (n-1)
example: 1, 3, 5, 7, 9, 11, 13, ...
the first number
common difference (f)
the nth number to obtain
Geometric Sequence Calculator
definition: an = a × rn-1
example: 1, 2, 4, 8, 16, 32, 64, 128, ...
the first number
common ratio (r)
the nth number to obtain
Fibonacci Sequence Calculator
definition: a0=0; a1=1; an = an-1 + an-2;
example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, ...
the nth number to obtain