4, 28, 160, 990, 6970, 55832, 502560

• dude plz provide the sol. for this ques. i think the ques. is wrong..
• 12 years agoHelpfull: Yes(0) No(1)
• im not know
• 9 years agoHelpfull: Yes(0) No(0)
• 55832 wrong one but plz koi solution send karo
  
• 8 years agoHelpfull: Yes(0) No(0)
• 4*4+(4*3) =36 28*5+(5*4)=160 160 *6+(6*5).....so n
  
• 8 years agoHelpfull: Yes(0) No(0)