Numbers k such that 2*k-1, 4*k-1, 6*k-1, 8*k-1, 10*k-1 and 12*k-1 are primes.

Terms

a(0) =77385a(1) =87675a(2) =320775a(3) =329175a(4) =509355a(5) =1137045a(6) =1447110a(7) =2623005a(8) =3310965a(9) =3974880a(10) =4095000a(11) =4339335a(12) =5183220a(13) =6163815a(14) =6975780a(15) =9080190a(16) =9462285a(17) =10957170a(18) =11139975a(19) =11148900a(20) =12382755a(21) =12796140a(22) =15514695a(23) =15917580