pad(n) + pad(n) = pad(n+2) + pad(n-5)

  pad(n-1) + pad(n) = pad(n+2)

  pad(n-2) + pad(n) = pad(n+1) + pad(n-5)
 
  pad(n-3) + pad(n) = pad(n+1) + pad(n-8)

  pad(n-4) + pad(n) = pad(n+1)



  bit n set in A of addend
   will set N+2 if B(N) or B(N-1)
   will set N+1 if B(N-2) or B(N-3) or B(N-4)
   will set N-5 if B(N) or B(N-2)
   will set N-9 if B(N) or B(N-3)

 bit B(N) passes if A(N) = 0 and A(N+1) = A(N+2) = A(N+3) = A(N+4) = 0

 P(N)/P(N-1) = plastic constant
 P(N)/P(N-2) about 1 + 3/4

 P(N)/P(N-3) about 2 + 1/3

 P(N)/P(N-4) about 3 + 1/7

 P(N)/P(N-5) about 4 + 1/7

 P(N)/P(N-6) about 5 + 1/2

 P(N)/P(N-7) about 7 + 

 P(N)/P(N-8) about 9 + 

 P(N)/P(N-9) about 12 +

 P(N)/P(N-10) about 16 + or P(10)



then

 P(N)/P(N-11) about 22 or P(11) + P(1)
 P(N)/P(N-12) about 29 or P(12) + P(1)
 P(N)/P(N-13) about 38 or P(13) + P(1)
 P(N)/P(N-14) about 51 or P(14) + P(2)

1
1
1
2
3
4
5
7
9
12
16
21
28
37
49
65
86
114
151
200
265
351
465
616
816
1081
1432
1897
2513
3329