Primes p such that p*(p-1)/2-5 and p*(p-1)/2+5 are also prime numbers.

Terms

a(0) =13a(1) =157a(2) =673a(3) =1069a(4) =1117a(5) =1153a(6) =1213a(7) =1597a(8) =2029a(9) =2089a(10) =2437a(11) =2713a(12) =2833a(13) =3613a(14) =4057a(15) =4909a(16) =5653a(17) =6337a(18) =6529a(19) =7549a(20) =7993a(21) =8053a(22) =9613a(23) =10789a(24) =11497a(25) =11689a(26) =12073a(27) =12373a(28) =13309a(29) =13669