Sum of matrix in which each element is absolute difference of its row and column numbers | Retuen the sum of matrix in which each element is absolute difference of its corresponding row and column number row ; Driver Code
function findSum ( n ) { n -- ; let sum = 0 ; sum += ( n * ( n + 1 ) ) / 2 ; sum += ( n * ( n + 1 ) * ( 2 * n + 1 ) ) / 6 ; return sum ; } let n = 3 ; document . write ( findSum ( n ) ) ;