Number of primes between successive Lucas numbers.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =2a(6) =4a(7) =6a(8) =9a(9) =15a(10) =20a(11) =31a(12) =48a(13) =72a(14) =110a(15) =170a(16) =257a(17) =400a(18) =608a(19) =950a(20) =1448a(21) =2256a(22) =3487a(23) =5413a(24) =8440a(25) =13118a(26) =20478a(27) =31932a(28) =49995a(29) =78222