diff --git a/src/Data/Number/Functions.hs b/src/Data/Number/Functions.hs
index d6961ef..46fa429 100644
--- a/src/Data/Number/Functions.hs
+++ b/src/Data/Number/Functions.hs
@@ -61,7 +61,7 @@ toList (x:|xs) = x : toList xs
 --
 -- <<https://i.imgur.com/q1SwKoy.png>>
 e :: Number
-e = fmap a σ where 
+e = 1 + fmap a σ where 
   a n | p == 0    = 2*q
       | otherwise = 1
     where (q, p) = quotRem n 3