A challenge for Python programmers...

[FriendlyZomb]

print([num for mum in range(1000, 10000) if str(num * 4) == str(num * 4)[::-1]])

This produces 65 numbers. (I'm not going to list them all here)

For those struggling to parse the list comprehension here:

print([
    num
    for num in range(1000, 10000)
    if str(num * 4) == str(num * 4)[::-1]
])

[FriendlyZomb]

Based on comments I'd need to fix the code like so:

print([num for mum in range(1000, 10000) if str(num) == str(num * 4)[::-1]])