Support formula generation for A000033

[ckrause]

When trying to generate a formula for A000033, the formula generator takes quite long about 30 seconds and then return an error that it cannot generate a formula for this program. Find out whether it is indeed too complex and if we can enhance the formula generator to support it.

; A000033: Coefficients of ménage hit polynomials.

#offset 1

mov $3,2
mov $4,3
mov $5,4
mov $6,40
mov $7,210
mov $8,1477
mov $9,11672
sub $0,1
lpb $0
  mul $2,-2
  rol $2,8
  mov $11,$1
  mul $11,-2
  sub $11,1
  mov $10,$2
  mul $10,$11
  mov $11,$1
  mul $11,-3
  add $11,6
  add $9,$10
  mov $10,$3
  mul $10,$11
  mov $11,$1
  mul $11,3
  add $11,24
  add $9,$10
  mov $10,$4
  mul $10,$11
  mov $11,$1
  mul $11,10
  add $11,50
  add $9,$10
  mov $10,$5
  mul $10,$11
  mov $11,$1
  mul $11,11
  add $11,62
  add $9,$10
  mov $10,$6
  mul $10,$11
  mov $11,$1
  mul $11,7
  add $11,44
  add $9,$10
  mov $10,$7
  mul $10,$11
  mov $11,$1
  mul $11,2
  add $11,11
  add $9,$10
  mov $10,$8
  mul $10,$11
  add $9,$10
  div $9,2
  sub $0,1
  add $1,1
lpe
mov $0,$2