Number of solutions to c(1)*prime(3) + ... + c(2n)*prime(2n+2) = -2, where c(i) = +-1 for i > 1, c(1) = 1.
A261060
Number of solutions to c(1)*prime(3) + ... + c(2n)*prime(2n+2) = -2, where c(i) = +-1 for i > 1, c(1) = 1.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =1a(4) =9a(5) =22a(6) =38a(7) =143a(8) =676a(9) =1815a(10) =7434a(11) =22452a(12) =87485a(13) =290873a(14) =1092072a(15) =3894381a(16) =13988849a(17) =49672279a(18) =184745525a(19) =677809709a(20) =2495632892a(21) =9260315018a(22) =34280441347a(23) =127419049587a(24) =474867366809
External references
- oeis: A261060