Number of solutions to c(1)*prime(1) +...+ c(2n+1)*prime(2n+1) = 0, where c(i) = +-1 for i > 1, c(1) = 1.
A022894
Number of solutions to c(1)*prime(1) +...+ c(2n+1)*prime(2n+1) = 0, where c(i) = +-1 for i > 1, c(1) = 1.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =13a(6) =39a(7) =122a(8) =392a(9) =1286a(10) =4341a(11) =14860a(12) =51085a(13) =178402a(14) =634511a(15) =2260918a(16) =8067237a(17) =29031202a(18) =105250449a(19) =383579285a(20) =1404666447a(21) =5171065198a(22) =19141008044a(23) =71124987313a(24) =263548339462a(25) =983424096451
External references
- oeis: A022894