What is the next number in this series?

4,12,84,3612....

• 6526884
  
  ((4^2)/2)+4=12
  ((12^2)/2)+12=84
  ((84^2)/2)+84=3612
  ((3612^2)/2)+3612=6526884
  
  
  
• 9 years agoHelpfull: Yes(18) No(1)
• 4*3 = 12, 12 *7 = 84, 84*43 = 3612 ,3612*1807 = 6526884
  3= 4/2 +1, 7 = 12/2 +1, 43 = 84 / 2 +1 , 1807 = 3612/2 +1
• 7 years agoHelpfull: Yes(3) No(0)
• 4*(2*1+1)=12
  
  12*(3*2+1)=84 // 3*2+1=7 and multiply it by 6 add +1 and multiply in 84 to get result
  
  84*(7*6+1)=3612
  
  3612(43*42+1)=6526884
• 9 years agoHelpfull: Yes(2) No(0)
• (4)^2/2+4=12
  ((12)^2)/2+12=84
  ((84)^2)/2+84=3612
  ((3612)^2+3612=6526884
• 9 years agoHelpfull: Yes(2) No(0)
• (3612^2/2)+3612+6526884
• 9 years agoHelpfull: Yes(1) No(0)
• 4 == 1 2 2 4
  
  take last two ( 2 & 4)--->> (2+1)*4==12
  
  12 == 1 2 3 4 6 12
  
  take last two (6 & 12)----> (6+1)*12==84
  
  84 ==1 2 ......... 42 84
  
  take last two (42 & 84)----> (42+1)*84== 3612
  
  3612 ==1 2 ......... 1806 3612
  
  take last two (1806 & 3612)----> (1806+1)*3612== 6526884
  
  
  correct me if i m wrong plzzzzzzzzzzzzzzzzz....
  thankxxxxxxxxxxxxxxxxxx :-)
• 8 years agoHelpfull: Yes(1) No(1)
• (3612^2)/2+3612=6526884
• 9 years agoHelpfull: Yes(0) No(0)
• (3612^2)/2+3612=6526884
• 9 years agoHelpfull: Yes(0) No(0)
• 12/4=3
  84/12=3*(3-1)+1=7
  3612/84=7*(7-1)+1=43
  so ,ans=3612*[43*(43-1)+1]=6526884
  
• 7 years agoHelpfull: Yes(0) No(0)