Primes of the form prime(n+2)*prime(n+1) - prime(n) +- 1.

Terms

a(0) =31a(1) =71a(2) =73a(3) =137a(4) =211a(5) =311a(6) =419a(7) =421a(8) =647a(9) =877a(10) =1117a(11) =1487a(12) =1979a(13) =2447a(14) =3079a(15) =3547a(16) =4027a(17) =7307a(18) =7309a(19) =12211a(20) =14243a(21) =18911a(22) =18913a(23) =23557a(24) =25439a(25) =28729a(26) =36683a(27) =37831a(28) =46853a(29) =50411