Trinomial Triangle | Javascript Program to print trinomial triangle . ; Function to find the trinomial triangle value . ; Using property of trinomial triangle . ; If value already calculated , return that . ; base case ; base case ; recursive step and storing the value . ; Function to print Trinomial Triangle of height n . ; printing n rows . ; printing first half of triangle ; printing second half of triangle . ; Driven Program
var MAX = 10 function TrinomialValue ( dp , n , k ) { if ( k < 0 ) k = - k ; if ( dp [ n ] [ k ] != 0 ) return dp [ n ] [ k ] ; if ( n == 0 && k == 0 ) return 1 ; if ( k < - n k > n ) return 0 ; return ( dp [ n ] [ k ] = TrinomialValue ( dp , n - 1 , k - 1 ) + TrinomialValue ( dp , n - 1 , k ) + TrinomialValue ( dp , n - 1 , k + 1 ) ) ; } function printTrinomial ( n ) { var dp = Array . from ( Array ( MAX ) , ( ) => Array ( MAX ) . fill ( 0 ) ) ; for ( var i = 0 ; i < n ; i ++ ) { for ( var j = - i ; j <= 0 ; j ++ ) document . write ( TrinomialValue ( dp , i , j ) + " " ) ; for ( var j = 1 ; j <= i ; j ++ ) document . write ( TrinomialValue ( dp , i , j ) + " " ) ; document . write ( " " ) ; } } var n = 4 ; printTrinomial ( n ) ;