Numbers k such that k-1, k-3, k-7 and k-9 are all prime.

Terms

a(0) =14a(1) =20a(2) =110a(3) =200a(4) =830a(5) =1490a(6) =1880a(7) =2090a(8) =3260a(9) =3470a(10) =5660a(11) =9440a(12) =13010a(13) =15650a(14) =15740a(15) =16070a(16) =18050a(17) =18920a(18) =19430a(19) =21020a(20) =22280a(21) =25310a(22) =31730a(23) =34850a(24) =43790a(25) =51350a(26) =55340a(27) =62990a(28) =67220a(29) =69500