Concatenation of 'prevprime(k) and k and nextprime(k)' is a prime.

Terms

a(0) =7a(1) =10a(2) =13a(3) =16a(4) =19a(5) =36a(6) =37a(7) =40a(8) =43a(9) =46a(10) =58a(11) =63a(12) =74a(13) =85a(14) =88a(15) =97a(16) =98a(17) =104a(18) =125a(19) =132a(20) =143a(21) =153a(22) =156a(23) =164a(24) =168a(25) =169a(26) =175a(27) =188a(28) =196a(29) =203