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 A073488 #9 Apr 10 2021 05:52:38 %S A073488 110,130,170,182,190,230,238,266,273,290,310,322,357,370,374,399,406, %T A073488 410,418,430,434,470,483,494,506,518,530,546,561,574,590,598,602,609, %U A073488 610,627,638,651,658,670,682,710,714,730,741,742,754,759,777,782,790 %N A073488 Squarefree numbers having exactly two prime gaps. %H A073488 Amiram Eldar, <a href="/A073488/b073488.txt">Table of n, a(n) for n = 1..10000</a> %F A073488 A073484(a(n)) = 2. %e A073488 1430 is a term, as 1430 = 2*5*11*13 with two gaps: between 2 and 5 and between 5 and 11. %t A073488 q[n_] := SequenceCount[FactorInteger[n][[;; , 1]], {p1_, p2_} /; p2 != NextPrime[p1], Overlaps -> True] == 2; Select[Range[800], SquareFreeQ[#] && q[#] &] (* _Amiram Eldar_, Apr 10 2021 *) %Y A073488 Cf. A005117, A073486, A073487, A073489, A073494. %K A073488 nonn %O A073488 1,1 %A A073488 _Reinhard Zumkeller_, Aug 03 2002