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 A030661 #8 Jul 08 2025 19:35:09 %S A030661 6,15,35,35,77,77,143,143,143,143,221,221,323,323,323,323,437,437,667, %T A030661 667,667,667,899,899,899,899,899,899,1147,1147,1517,1517,1517,1517, %U A030661 1517,1517,1763,1763,1763,1763 %N A030661 Product of next 2 primes after n. %F A030661 a(n) = A151800(n) * A101300(n) . - _R. J. Mathar_, Aug 09 2019 %p A030661 A030661 := n->nextprime(n) * nextprime(nextprime(n)); %Y A030661 Cf. A000040. %K A030661 nonn %O A030661 1,1 %A A030661 _N. J. A. Sloane_