This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A330410 #7 Dec 15 2019 11:32:19
%S A330410 11,17,29,41,65,77,101,113,137,173,185,221,245,257,281,317,353,365,
%T A330410 401,425,437,473,497,533,581,605,617,641,653,677,761,785,821,833,893,
%U A330410 905,941,977,1001,1037,1073,1085,1145,1157,1181,1193,1265,1337,1361,1373,1397,1433,1445
%N A330410 a(n) = 6*prime(n) - 1.
%C A330410 Composite terms are a(k) with k in {5, 6, 11, 12, 13, 18, 20, 21, ...} = indices of primes missing in A158015. Primes are A016969(A158015 - 1).
%F A330410 a(n) = A016969(A000040(n)-1) = 6p - 1 with p = A000040(n) = prime(n).
%o A330410 (PARI) apply( a(n)=6*prime(n)-1, [1..99])
%o A330410 (PARI) apply( n->6*n-1, primes(99))
%Y A330410 Cf. A000040 (primes), A016969 (6n+5), A024898 (6n-1 is prime), A158015 (primes in A024898), A049452 = {n(6n-1)}, A255584 = A033570(A130800) (semiprimes (2n+1)(3n+1)), A245365 (primes of the form n(3n-1)/2).
%K A330410 nonn
%O A330410 1,1
%A A330410 _M. F. Hasler_, Dec 13 2019