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 A013636 #18 Jul 08 2025 02:49:49
%S A013636 0,2,6,15,20,35,42,77,88,99,110,143,156,221,238,255,272,323,342,437,
%T A013636 460,483,506,667,696,725,754,783,812,899,930,1147,1184,1221,1258,1295,
%U A013636 1332,1517,1558,1599,1640,1763
%N A013636 a(n) = n*nextprime(n).
%H A013636 Harvey P. Dale, <a href="/A013636/b013636.txt">Table of n, a(n) for n = 0..1000</a>
%F A013636 a(n) = n^2 + O(n^1.525). - _Charles R Greathouse IV_, Dec 05 2024
%p A013636 [ seq(nextprime(i)*i,i=0..100) ];
%t A013636 Table[n NextPrime[n],{n,0,50}] (* _Harvey P. Dale_, Jan 08 2025 *)
%o A013636 (PARI) a(n) = n*nextprime(n+1); \\ _Michel Marcus_, Dec 05 2024
%Y A013636 Cf. A151800.
%K A013636 nonn,easy
%O A013636 0,2
%A A013636 _N. J. A. Sloane_
%E A013636 Comment removed by _Charles R Greathouse IV_, Mar 19 2010