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 A383242 #9 May 13 2025 23:12:37
%S A383242 7,31,71,309,287,885,647,1749,4003,1799,6883,6069,3527,8085,14947,
%T A383242 18763,7199,24523,19029,10367,34603,26229,44323,69065,39189,20807,
%U A383242 44085,23327,49269,200915,66549,107683,38087,207111,44999,142243,153547,108885,173347
%N A383242 a(n) = p(n)*p(n+1)*(p(n+1) - p(n)) + 1, where p(n) = prime(n).
%F A383242 a(n) = A383241(n) + 2.
%t A383242 z = 60; p[n_] := Prime[n];
%t A383242 f[n_] := p[n]*p[n + 1]*(p[n + 1] - p[n])
%t A383242 Table[f[n] - 1, {n, 1, z}] (* A383241 *)
%t A383242 Table[f[n] + 1, {n, 1, z}] (* A383242 *)
%Y A383242 Cf. A000042, A383241, A383243, A383244.
%K A383242 nonn
%O A383242 1,1
%A A383242 _Clark Kimberling_, May 07 2025