Polyglot Anagrams Robbers' Thread
05AB1E, 38 bytes, Loovjo, A000290

nXtdief e():return X*X
pr e(input())##


Try it online!

Very likely not the intended solution, but it works.

Explanation

n      # square input
 X     # push 1
  t    # push sqrt(1)
   d   # push is_number(1.0)
    i  # if true do the rest of the code (1.0 is not a number so it will never execute)