a(n) = prime(n+8) - prime(n).

Terms

a(0) =21a(1) =26a(2) =26a(3) =30a(4) =30a(5) =30a(6) =30a(7) =34a(8) =36a(9) =32a(10) =36a(11) =34a(12) =32a(13) =36a(14) =36a(15) =36a(16) =38a(17) =40a(18) =36a(19) =36a(20) =36a(21) =34a(22) =44a(23) =42a(24) =40a(25) =38a(26) =46a(27) =44a(28) =48a(29) =50