Number of solutions to +-p(1)+-p(2)+-...+-p(2n-1) = 2, where p(i) is the i-th prime.

A113041

Number of solutions to +-p(1)+-p(2)+-...+-p(2n-1) = 2, where p(i) is the i-th prime.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =3a(4) =9a(5) =27a(6) =78a(7) =249a(8) =782a(9) =2574a(10) =8676a(11) =29714a(12) =102162a(13) =356797a(14) =1268990a(15) =4521769a(16) =16134137a(17) =58061535a(18) =210499244a(19) =767154326a(20) =2809323733a(21) =10342098153a(22) =38281849044a(23) =142249547127a(24) =527095215036

External references