Question: 2. A sequence is defined as follows. H(n) - 3 ifn -1; H(n)H(n-1)+n+1 ifn> 1. Write a recursive method with signature public static int

2. A sequence is defined as follows. H(n) - 3 ifn -1;

2. A sequence is defined as follows. H(n) - 3 ifn -1; H(n)H(n-1)+n+1 ifn> 1. Write a recursive method with signature "public static int H(int n)" that computes the n-th number of the sequence. 3. Write a recursive method with signature "public static int Sum(int n)" that computes the following sum 1*1+2*2+ ... +n*n. 4. Write a recursive method with signature "public static void Reverse(int nl)" that displays the digits in a positive integer n1 in reverse order.

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