Number of solutions to c(1)*prime(4) + ... + c(n)*prime(n+3) = 2, where c(i) = +-1 for i > 1, c(1) = 1.
A022920
Number of solutions to c(1)*prime(4) + ... + c(n)*prime(n+3) = 2, where c(i) = +-1 for i > 1, c(1) = 1.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =0a(9) =7a(10) =0a(11) =12a(12) =0a(13) =61a(14) =0a(15) =131a(16) =0a(17) =472a(18) =0a(19) =2039a(20) =0a(21) =5924a(22) =0a(23) =21095a(24) =0a(25) =76058a(26) =0a(27) =274023a(28) =0a(29) =1032989
External references
- oeis: A022920