Primes p for which p^i - 4 is prime for i = 1, 3, 5 and 7.

Terms

a(0) =971a(1) =12641a(2) =205607a(3) =228341a(4) =276557a(5) =412343a(6) =1012217a(7) =1101323a(8) =1902881a(9) =2171021a(10) =2477411a(11) =2692121a(12) =4116377a(13) =4311677a(14) =6060953a(15) =6182993a(16) =6388913a(17) =6444863a(18) =8341121a(19) =8551451a(20) =9507527a(21) =10523141a(22) =10997411a(23) =11444093a(24) =14101361a(25) =14656307a(26) =14813147a(27) =15435587a(28) =17337521