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 A084716 #10 Jan 19 2023 03:12:28
%S A084716 1,2,4,12,36,72,432,1296,2592,10368,72576,508032,1524096,12192768,
%T A084716 73156608,146313216,438939648,2633637888,23702740992,142216445952,
%U A084716 1991030243328,37829574623232,416125320855552,1664501283422208,6658005133688832,126502097540087808
%N A084716 a(1) = 1, a(n) = smallest multiple of a(n-1) > a(n-1) such that a(n) + 1 is a prime.
%H A084716 Amiram Eldar, <a href="/A084716/b084716.txt">Table of n, a(n) for n = 1..577</a>
%t A084716 a[1] = 1; a[n_] := a[n] = Catch[For[k = 2, True, k++, an = k*a[n - 1]; If[PrimeQ[an + 1], Throw[an]]]]; Table[a[n], {n, 1, 23}] (* _Jean-François Alcover_, Nov 27 2012 *)
%Y A084716 Cf. A084717, A084718, A036012.
%K A084716 nonn
%O A084716 1,2
%A A084716 _Amarnath Murthy_, Jun 11 2003
%E A084716 Edited by _Don Reble_, Jun 19 2003