diff --git a/lambdabot-trusted.cabal b/lambdabot-trusted.cabal
--- a/lambdabot-trusted.cabal
+++ b/lambdabot-trusted.cabal
@@ -1,5 +1,5 @@
 name:                   lambdabot-trusted
-version:                5.0.2
+version:                5.0.2.1
 
 license:                GPL
 license-file:           LICENSE
diff --git a/src/Lambdabot/Plugin/Haskell/Eval/Trusted.hs b/src/Lambdabot/Plugin/Haskell/Eval/Trusted.hs
--- a/src/Lambdabot/Plugin/Haskell/Eval/Trusted.hs
+++ b/src/Lambdabot/Plugin/Haskell/Eval/Trusted.hs
@@ -1,14 +1,17 @@
 {-# LANGUAGE Trustworthy #-}
 module Lambdabot.Plugin.Haskell.Eval.Trusted
-    ( module Test.QuickCheck.Safe
+    ( module Math.OEIS
+    , module Test.QuickCheck.Safe
     , module Lambdabot.Plugin.Haskell.Check.ShowQ
     , module Lambdabot.Plugin.Haskell.Eval.Trusted
-    , module GHC.Exts, Constraint
     ) where
 
+import Math.OEIS
 import Lambdabot.Plugin.Haskell.Check.ShowQ
 import Test.QuickCheck.Safe
-import GHC.Exts (Constraint, IsList (..), IsString (..))
+
+describeSequence :: SequenceData -> Maybe String
+describeSequence = fmap description . lookupSequence
 
 newtype Mu f = In { out :: f (Mu f) }