text: Trinomial Triangle | Function to find the trinomial triangle value . ; base case ; base case ; recursive step . ; Function to print Trinomial Triangle of height n . ; printing n rows . ; printing first half of triangle ; printing second half of triangle . ; Driver code
code: function TrinomialValue ( n , k ) { if ( n == 0 && k == 0 ) return 1 ; if ( k < - n k > n ) return 0 ; return TrinomialValue ( n - 1 , k - 1 ) + TrinomialValue ( n - 1 , k ) + TrinomialValue ( n - 1 , k + 1 ) ; } function printTrinomial ( n ) { for ( let i = 0 ; i < n ; i ++ ) { for ( let j = - i ; j <= 0 ; j ++ ) document . write ( TrinomialValue ( i , j ) + " " ) ; for ( let j = 1 ; j <= i ; j ++ ) document . write ( TrinomialValue ( i , j ) + " " ) ; document . write ( " " ) ; } } let n = 4 ; printTrinomial ( n ) ;