a(n) = prime(n+3)*prime(n) - prime(n+1)*prime(n+2).

Terms

a(0) =-1a(1) =-2a(2) =-12a(3) =-24a(4) =-12a(5) =-24a(6) =56a(7) =-78a(8) =-48a(9) =42a(10) =-184a(11) =-24a(12) =152a(13) =46a(14) =-260a(15) =-48a(16) =102a(17) =-304a(18) =110a(19) =126a(20) =-60a(21) =276a(22) =-250a(23) =-630a(24) =-24a(25) =-12a(26) =-24a(27) =1272a(28) =-72a(29) =-1156