Q. What is the next number of the following sequence
1, 2, 5, 26...

• Look upon the series carefully;
  1,2,5,26...
  
  1 * 1 + 1 = 1
  2 * 2 + 1 = 5
  5 * 5 + 1 = 26
  similarly
  26* 26+ 1 = 677
  so answer will be 677
• 10 years agoHelpfull: Yes(9) No(2)
• 1*1+1=2
  2*2+1=5
  5*5+1=26
  26*26+1=677
• 10 years agoHelpfull: Yes(4) No(4)
• 26*2+1=53
  multiply with adding by 1
• 10 years agoHelpfull: Yes(1) No(1)
• {(0)^2}+1=1
  {(1)^2}+1=2
  {(2)^2}+1=5
  {(5)^2}+1=26
  {(26)^2}+1=677
  so answer is 677
• 10 years agoHelpfull: Yes(1) No(0)
• 2*2=4+1=5
  5*5=25+1=26
  26*26=676+1=677
• 10 years agoHelpfull: Yes(0) No(1)
• The next number is 677.
  (1X1)+1=2
  (2X2)+1=5
  (5X5)+1=26
  (26X26)+1=677
• 10 years agoHelpfull: Yes(0) No(1)
• 677
  
  0^2+1=1
  1^2+1=2
  2^2+1=5
  5^2+1=26
  26^2+1=677
• 10 years agoHelpfull: Yes(0) No(0)
• in this series
  t(n)=t(n-1)^2+1
  now next term is =(26)^2+1=676+1=677
• 10 years agoHelpfull: Yes(0) No(0)
• 1*1+1=2
  2*2+1=5
  5*5+1=26
  26*26+1=677
• 10 years agoHelpfull: Yes(0) No(0)
• (26*26)+1=677
  
• 10 years agoHelpfull: Yes(0) No(0)
• 1*1+1=2
  2*2+1=5
  5*5+1=26
  26*26+1=677
• 9 years agoHelpfull: Yes(0) No(0)