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 A287747 #17 Aug 26 2024 09:55:29
%S A287747 12345678910,234567891011,3456789101112,45678910111213,
%T A287747 567891011121314,6789101112131415,78910111213141516,
%U A287747 891011121314151617,9101112131415161718,10111213141516171819,11121314151617181920,12131415161718192021,13141516171819202122,14151617181920212223
%N A287747 Concatenation {n, n + 1,.., n + 9}.
%C A287747 For the position of primes in this sequence, see A287244.
%H A287747 Paolo Xausa, <a href="/A287747/b287747.txt">Table of n, a(n) for n = 1..1000</a>
%t A287747 A287747[n_] := FromDigits[Flatten[IntegerDigits[Range[n, n + 9]]]];
%t A287747 Array[A287747, 25] (* _Paolo Xausa_, Aug 26 2024 *)
%Y A287747 Cf. A001704, A001703, A279204, A287244.
%K A287747 nonn,base,easy
%O A287747 1,1
%A A287747 _XU Pingya_, Jun 01 2017