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

A261057

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

Terms

    a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =13a(6) =40a(7) =123a(8) =388a(9) =1284a(10) =4332a(11) =14868a(12) =51094a(13) =178361a(14) =634422a(15) =2260717a(16) =8066841a(17) =29030051a(18) =105247340a(19) =383574146a(20) =1404657053a(21) =5171018981a(22) =19140750300a(23) =71124341227a(24) =263546155710a(25) =983417309702

External references