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 A044234 #23 Jul 10 2024 16:42:48
%S A044234 47,111,175,239,303,367,376,431,495,559,623,687,751,815,879,888,943,
%T A044234 1007,1071,1135,1199,1263,1327,1391,1400,1455,1519,1583,1647,1711,
%U A044234 1775,1839,1903,1912,1967,2031,2095,2159,2223,2287,2351
%N A044234 Numbers n such that string 5,7 occurs in the base 8 representation of n but not of n-1.
%H A044234 Georg Fischer, <a href="/A044234/b044234.txt">Table of n, a(n) for n = 1..1000</a>
%F A044234 a(n) = 512*(n-7)/9 + 376 when n == 7 mod 9; otherwise a(n) = 64*(n - floor((n+1)/9) - 1) + 47. - _Bob Selcoe_, Apr 01 2016
%t A044234 SequencePosition[Table[If[SequenceCount[IntegerDigits[n,8],{5,7}]>0,1,0],{n,2500}],{0,1}][[;;,2]] (* _Harvey P. Dale_, Jul 10 2024 *)
%Y A044234 Cf. A007094.
%K A044234 nonn,base
%O A044234 1,1
%A A044234 _Clark Kimberling_
%E A044234 Linear recurrence removed and terms a(54), a(126) etc. corrected by _Georg Fischer_, Jun 27 2019