Array: each row starts with the least prime not in a previous row, and each prime p in a row is followed by the least prime > 3*p.
A229610
Array: each row starts with the least prime not in a previous row, and each prime p in a row is followed by the least prime > 3*p.
Terms
- a(0) =2a(1) =7a(2) =3a(3) =23a(4) =11a(5) =5a(6) =71a(7) =37a(8) =17a(9) =13a(10) =223a(11) =113a(12) =53a(13) =41a(14) =19a(15) =673a(16) =347a(17) =163a(18) =127a(19) =59a(20) =29a(21) =2027a(22) =1049a(23) =491a(24) =383a(25) =179a(26) =89a(27) =31a(28) =6089a(29) =3163
External references
- oeis: A229610