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

A261059

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

Terms

    a(0) =1a(1) =0a(2) =2a(3) =1a(4) =4a(5) =25a(6) =47a(7) =237a(8) =562a(9) =1965a(10) =7960a(11) =24148a(12) =85579a(13) =307569a(14) =1104519a(15) =4106381a(16) =14710760a(17) =52113647a(18) =193181449a(19) =698356631a(20) =2574590311a(21) =9600573372a(22) =35644252223a(23) =131545038705a(24) =492346772797

External references