Number of solutions to c(1)*prime(1)+...+c(2n)*prime(2n) = -1, where c(i) = +-1 for i > 1, c(1) = 1.

A261061

Number of solutions to c(1)*prime(1)+...+c(2n)*prime(2n) = -1, where c(i) = +-1 for i > 1, c(1) = 1.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =3a(4) =8a(5) =23a(6) =68a(7) =221a(8) =709a(9) =2344a(10) =8006a(11) =27585a(12) =95114a(13) =335645a(14) =1202053a(15) =4267640a(16) =15317698a(17) =55248527a(18) =200711160a(19) =733697248a(20) =2696576651a(21) =9941588060a(22) =36928160817a(23) =136800727634a(24) =508780005068

External references