[seqfan] Knife numbers

[Eric Angelini]

Hello SeqFans,
If I'm not wrong, the "Knife numbers" 
(as we might call them) are not in the 
database.

A "knife number" K can be divided 
in two chunks P and Q such that P+Q 
divide K.

K = 10, 12, 18, 20, 21, 24, 27, 30, 36, 40, 42, 45, 48, 50, 54, 60, 63, 70, 72, 80, 81, 84, 90, 105, 108, 110, 120, 126, 130, 132,...

Examples:
12 is divisible by 1+2 (result = 4)
126 is divisible by 12+6 (result = 7)
132 is divisible by 1+32 (result = 4)
...
Best,
É.