Question: package unl.cse.recursion; import java.math.BigInteger; public class PelNumbers private static final BigInteger TWO new BigInteger(2); public static BigInteger PelUNumber (Integer n) f return BigInteger.ZERO; else if
package unl.cse.recursion; import java.math.BigInteger; public class PelNumbers private static final BigInteger TWO new BigInteger("2"); public static BigInteger PelUNumber (Integer n) f return BigInteger.ZERO; else if (n1) return BigInteger. ONE; else t BigInteger a-PellNumber(n-1); Big Integer b = Pel!Number(n-2); return a.multiply (TWO).add (b); public static void main(String args [l) { int n = 9; BigInteger p_n PelLNumber(n) System. out. printin ( "p ("4n+" ) "+P-n. tostring ( ) )
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