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 A375692 #32 Oct 11 2024 12:46:20
%S A375692 12345,23456,34567,45678,56789,678910,7891011,89101112,910111213,
%T A375692 1011121314,1112131415,1213141516,1314151617,1415161718,1516171819,
%U A375692 1617181920,1718192021,1819202122,1920212223,2021222324,2122232425,2223242526,2324252627,2425262728,2526272829
%N A375692 Decimal concatenation of the 5 numbers n,n+1,n+2,n+3,n+4.
%t A375692 Table[FromDigits[Join[Flatten[IntegerDigits/@{n,n+1,n+2,n+3,n+4}]]],{n,25}] (* _James C. McMahon_, Oct 11 2024 *)
%o A375692 (Python)
%o A375692 def a(n): return int(str(n)+str(n+1)+str(n+2)+str(n+3)+str(n+4))
%o A375692 (PARI) a(n) = eval(concat(vector(5, i, Str(n+i-1)))); \\ _Michel Marcus_, Sep 17 2024
%Y A375692 Cf. A001703, A001704, A193493, A279204.
%K A375692 nonn,base,easy
%O A375692 1,1
%A A375692 _Viljo Huhtala_, Aug 25 2024