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 A049103 #35 Nov 11 2020 02:43:14
%S A049103 44,75,98,116,147,171,242,243,244,332,387,507,548,603,604,724,844,908,
%T A049103 931,963,1075,1083,1251,1324,1412,1467,1556,1587,1675,1772,2523,2524,
%U A049103 2636,2644,2763,3283,3356,3411,3508,3788,3987,4075,4203,4204,4418,4491,4804,4868,4923,4924
%N A049103 Numbers k such that k and k+1 both have 6 divisors.
%D A049103 David Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, 1986, entry 44, p. 103.
%H A049103 Amiram Eldar, <a href="/A049103/b049103.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from Vincenzo Librandi)
%F A049103 a(n) = A049104(n) - 1. - _Zak Seidov_, Feb 11 2016
%t A049103 Flatten[Position[Partition[Table[DivisorSigma[0,n],{n,5000}],2,1],_?(# == {6,6}&)]] (* _Harvey P. Dale_, Apr 09 2012 *)
%o A049103 (PARI) isok(n) = (numdiv(n) == 6) && (numdiv(n+1) == 6); \\ _Michel Marcus_, Feb 11 2016
%Y A049103 Intersection of A005237 and A030515.
%Y A049103 Cf. A038400, A049104.
%K A049103 nonn
%O A049103 1,1
%A A049103 _N. J. A. Sloane_, _Felice Russo_, _Olivier Gérard_