How to convert a number into sum of numbers of specific length

I am trying to convert a number into array of (1s, 2s, 4s) so that their sum is equal to the number

NUMBER = 12

length 1: 12          = 12
length 2: 6+6         = 12
length 3: 4+4+4       = 12
length 4: 2+2+4+4     = 12
length 5: 2+2+2+2+4   = 12
length 6: 2+2+2+2+2+2 = 12
...
...
length 12: 1+1+1+1+1+1+1+1+1+1+1+1 = 12