a(n) = prime(n) + A033955(n).

Terms

a(0) =2a(1) =4a(2) =8a(3) =11a(4) =19a(5) =26a(6) =35a(7) =46a(8) =52a(9) =75a(10) =87a(11) =107a(12) =115a(13) =131a(14) =145a(15) =187a(16) =206a(17) =232a(18) =267a(19) =288a(20) =325a(21) =353a(22) =392a(23) =412a(24) =445a(25) =519a(26) =551a(27) =578a(28) =631a(29) =684