Bisection of A262310.

Terms

a(0) =-1a(1) =-7a(2) =9a(3) =-176a(4) =-673a(5) =1143a(6) =33201a(7) =315783a(8) =2210985a(9) =1790369a(10) =44496424a(11) =1040502519a(12) =-1810005816a(13) =7445790947a(14) =-134133273672a(15) =-627282760902