diff --git "a/math/oeis/A212013.\360\237\215\216" "b/math/oeis/A212013.\360\237\215\216"
deleted file mode 100644
index 30d2f75ce..000000000
--- "a/math/oeis/A212013.\360\237\215\216"
+++ /dev/null
@@ -1,4 +0,0 @@
-λN.
-  { Δ ⟜ (+)Λₒ 1 (2..N)
-  ; s ⟜  (+)/Δ; (s-)'Δ
-  }