Integers k such that k*28*c + 1 is prime for c = 1, 2, 4, 7 and 14.

Terms

a(0) =2136a(1) =2211a(2) =4071a(3) =5106a(4) =5430a(5) =9000a(6) =10656a(7) =17655a(8) =18315a(9) =20220a(10) =20805a(11) =21381a(12) =22356a(13) =22920a(14) =23025a(15) =29616a(16) =37050a(17) =39261a(18) =45795a(19) =49920a(20) =55686a(21) =60435a(22) =62205a(23) =64380a(24) =79356a(25) =81345a(26) =91455a(27) =94800a(28) =95910a(29) =96285