CalcMe documentationCommandsCombinatorics and ProgressionsLucasLucasReturns the desired Lucas number. Similar to the Fibonacci numbers, each Lucas number is defined to be the sum of its two immediately previous terms. The first two Lucas numbers are L0=2, L1=1 and for n greater than 2, Ln=Ln-1+Ln-2.Syntaxlucas(Integer) DescriptionGiven an integer nn, returns Ln.Related functionsFibonacci