Number of solutions to c(1)*prime(3) + ... + c(2n-1)*prime(2n+1) = -1, where c(i) = +-1 for i > 1, c(1) = 1.
A261063
Number of solutions to c(1)*prime(3) + ... + c(2n-1)*prime(2n+1) = -1, where c(i) = +-1 for i > 1, c(1) = 1.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =6a(5) =8a(6) =40a(7) =67a(8) =373a(9) =1232a(10) =3330a(11) =13656a(12) =47111a(13) =164957a(14) =582042a(15) =1967152a(16) =7129046a(17) =26655235a(18) =94956602a(19) =353789267a(20) =1300061367a(21) =4765080122a(22) =17726643505a(23) =66038899483a(24) =245431428625a(25) =919911458949
External references
- oeis: A261063