Partial sums of A127511.

Terms

a(0) =1a(1) =-1a(2) =-5a(3) =-5a(4) =-21a(5) =11a(6) =-53a(7) =-53a(8) =-53a(9) =459a(10) =-565a(11) =-565a(12) =-4661a(13) =3531a(14) =19915a(15) =19915a(16) =-45621a(17) =-45621a(18) =-307765a(19) =-307765a(20) =740811a(21) =2837963a(22) =-1356341a(23) =-1356341a(24) =-1356341a(25) =32198091a(26) =32198091a(27) =32198091a(28) =-236237365a(29) =-773108277