total ways = ( ways by placing 1 st bit as 1 + ways by placing 1 st bit as 0 )
let totalWays = waysToKAdjacentSetBits ( n , k , 1 , 0 , 1 ) + waysToKAdjacentSetBits ( n , k , 1 , 0 , 0 ) ; document . write ( " " + totalWays ) ;