Numbers k such that k+1 is a prime, k+2 is twice a prime, and k+3 is three times a prime.

Terms

a(0) =12a(1) =36a(2) =156a(3) =540a(4) =876a(5) =1200a(6) =1380a(7) =1620a(8) =2016a(9) =2556a(10) =2856a(11) =3060a(12) =4356a(13) =4440a(14) =5076a(15) =5580a(16) =5700a(17) =6336a(18) =6636a(19) =6660a(20) =6996a(21) =7416a(22) =8220a(23) =9180a(24) =9660a(25) =9900a(26) =10836a(27) =11496a(28) =12456a(29) =12600