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 A030642 #12 Jul 08 2025 19:34:39 %S A030642 2,15,323,111547,12449873237,154999344563559225589, %T A030642 24024796815132956872884975543558130445497 %N A030642 Product of next 2 primes. %F A030642 a(n) = A030661(a(n-1)). - _R. J. Mathar_, Aug 09 2019 %p A030642 A030642 := proc(n) %p A030642 option remember ; %p A030642 if n = 1 then %p A030642 2; %p A030642 else %p A030642 A030661(procname(n-1)) ; %p A030642 end if; %p A030642 end proc: %p A030642 seq(A030642(n),n=1..6) ; _R. J. Mathar_, Aug 09 2019 %t A030642 NestList[NextPrime[#] NextPrime[NextPrime[#]]&,2,10] (* _Harvey P. Dale_, Jul 26 2017 *) %Y A030642 Cf. A000040, A030641. %K A030642 nonn %O A030642 1,1 %A A030642 _N. J. A. Sloane_