Integers of the form (p(n+1)*p(n) - 1)/(p(n+1) - p(n)) where p(n) denotes the n-th prime.

Terms

a(0) =5a(1) =7a(2) =17a(3) =19a(4) =55a(5) =71a(6) =109a(7) =111a(8) =161a(9) =191a(10) =379a(11) =415a(12) =449a(13) =505a(14) =521a(15) =681a(16) =881a(17) =961a(18) =1025a(19) =1079a(20) =1189a(21) =1231a(22) =1639a(23) =1799a(24) =2071a(25) =2449a(26) =2591a(27) =2755a(28) =2991a(29) =3079