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 A092844 #17 Oct 11 2022 10:44:51
%S A092844 2,32,532,7532,117532,1417532,18417532,208417532,2508417532,
%T A092844 31508417532,341508417532,4041508417532,45041508417532,
%U A092844 475041508417532,5175041508417532,58175041508417532,648175041508417532
%N A092844 a(n) = Sum_{k=1..n} prime(k)*10^(k-1).
%H A092844 Robert Israel, <a href="/A092844/b092844.txt">Table of n, a(n) for n = 1..996</a>
%p A092844 ListTools:-PartialSums([seq(ithprime(i)*10^(i-1),i=1..30)]); # _Robert Israel_, Apr 12 2020
%t A092844 Array[Sum[Prime[k]*10^(k - 1), {k, #}] &, 17] (* _Michael De Vlieger_, Jun 22 2022 *)
%t A092844 Accumulate[Table[Prime[n]10^(n-1),{n,20}]] (* _Harvey P. Dale_, Oct 11 2022 *)
%o A092844 (PARI) a(n) = fromdigits(Vecrev(primes(n))); \\ _Kevin Ryde_, Jun 22 2022
%Y A092844 Cf. A038394, A135483, A287353.
%K A092844 nonn,easy
%O A092844 1,1
%A A092844 _Jorge Coveiro_, Apr 15 2004