1,4,13,40.............?

• the pattern is by multiples of 3 added to the preceding number;
  
  1+3= 4 that's 3
  4+9=13 because 3*3 is 9
  13+27=40 coz 9*3 is 27
  40+81=121 coz 27*3 is 81
  121+243=364 coz 81*3 is 243
  
  finally the series is 1,4,13,40,121,364.....
  
  hope this helps!
• 12 years agoHelpfull: Yes(6) No(0)
• 1,4,13,40,121,364....
  
  3^1 is added with 1, then3^2 is added with 4,then 3^3 is added with 13 and so on.
• 12 years agoHelpfull: Yes(2) No(2)
• difference between 1 and 4 is 3
  difference between 4 and 13 is 9 which is 3^2
  difference between 13 and 40 is 27 which is 3^3
  so after 40 the number is 40+81 which is 121 i.e. 40 + 3^4
• 12 years agoHelpfull: Yes(1) No(0)
• 1,4,13,46,121,364....
  3^1,3^2,3^3,3^4....terms are added to previous term
  
• 12 years agoHelpfull: Yes(0) No(0)
• 1*3+1=4
  4*3+1=13
  13*3+1=40
• 12 years agoHelpfull: Yes(0) No(0)