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7 times the primes.
4

%I #16 Dec 07 2019 12:18:28

%S 14,21,35,49,77,91,119,133,161,203,217,259,287,301,329,371,413,427,

%T 469,497,511,553,581,623,679,707,721,749,763,791,889,917,959,973,1043,

%U 1057,1099,1141,1169,1211,1253,1267,1337,1351,1379,1393,1477,1561,1589,1603,1631,1673,1687,1757,1799,1841,1883,1897

%N 7 times the primes.

%F a(n) = 7*prime(n) = 7*A000040(n).

%t 7 Prime@ Range@ 58 (* _Michael De Vlieger_, May 01 2016 *)

%o (PARI) a(n) = 7*prime(n); \\ _Michel Marcus_, May 01 2016

%o (Python)

%o from sympy import prime

%o for n in range(1,1000):print(7*prime(n),end=", ") # _Soumil Mandal_, May 08 2016

%Y Column 4 of A272214.

%Y k times the primes (k=1..6): A000040, A100484, A001748, A001749, A001750, A138636.

%K nonn,easy

%O 1,1

%A _Omar E. Pol_, Apr 30 2016