Sequence Guess

Guess the sequence. The solutions is near.


Sequence: 1 1 1 1 1 5 9 9 -31 -103 225 -2883 20017

Solution











































The solution is:
20017 671889 
And the recurrence formula is
 (seq[-1] + 4) -seq[-2] *seq[-3] +seq[-4] *seq[-5] 

This fine program was brought to you by hakank@bonetmail.com
My other useless programs.