a(n+1) is the least k such that k - (a(n-1)+a(n)) and k + (a(n-1)+a(n)) are primes; a(0)=0, a(1)=1.

Terms

a(0) =0a(1) =1a(2) =4a(3) =8a(4) =17a(5) =28a(6) =52a(7) =83a(8) =142a(9) =232a(10) =377a(11) =614a(12) =996a(13) =1641a(14) =2642a(15) =4290a(16) =6945a(17) =11246a(18) =18198a(19) =29457a(20) =47662a(21) =77124a(22) =124797a(23) =201928a(24) =326736a(25) =528723a(26) =855464a(27) =1384230a(28) =2239797a(29) =3624050