Numbers n such that (6n-1, 6n+1), (12n-1, 12n+1) and (18n-1, 18n+1) are 3 pairs of twin primes.

Terms

a(0) =1a(1) =8925a(2) =70070a(3) =70385a(4) =270725a(5) =355040a(6) =566650a(7) =866635a(8) =874335a(9) =1091545a(10) =1230740a(11) =1295980a(12) =1586095a(13) =1594285a(14) =1738380a(15) =1974210a(16) =2201325a(17) =2427145a(18) =2436665a(19) =3124660a(20) =3349990a(21) =3599470a(22) =3661350a(23) =4059825a(24) =4101790a(25) =4486020a(26) =4726540a(27) =5139680a(28) =5613370a(29) =5898655