Lucas Sequence Calculator

Generate Lucas numbers (2, 1, 3, 4, 7, 11, 18, ...) and explore their properties.

Parameters

Lucas Sequence (First 15 Terms)

L(0)=2L(1)=1L(2)=3L(3)=4L(4)=7L(5)=11L(6)=18L(7)=29L(8)=47L(9)=76L(10)=123L(11)=199L(12)=322L(13)=521L(14)=843

L(10)

123

= φ^10 + ψ^10

Sum of 15 Terms

2,206

Comparison with Fibonacci

nF(n)L(n)F(n-1)+F(n+1)
1111
2133
3244
4377
551111
681818
7132929
8214747
9347676

Notice that L(n) = F(n-1) + F(n+1) for all n ≥ 1

L(0)

2

Starting value

L(1)

1

Starting value

Properties & Formulas

Recurrence

L(n) = L(n-1) + L(n-2)

L(0) = 2, L(1) = 1

Closed Form

L(n) = φ^n + ψ^n

Fibonacci Relation

L(n) = F(n-1) + F(n+1)

Product Identity

L(n) × F(n) = F(2n)