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 A088135 #7 Jan 31 2023 13:03:34
%S A088135 4,6,10,14,2,4,8,10,5,11,4,10,5,7,11,8,14,7,13,8,10,16,11,17,16,2,4,8,
%T A088135 10,4,8,2,8,10,10,2,8,4,8,4,10,2,2,4,8,10,3,5,9,11,5,11,3,3,9,5,11,3,
%U A088135 9,3,5,5,10,4,6,10,4,10,10,12,6,12,10,6,12,6,12,10,5,13,13,5,5,7,13,7,13
%N A088135 Sum of first and last digits of n-th prime.
%H A088135 Harvey P. Dale, <a href="/A088135/b088135.txt">Table of n, a(n) for n = 1..1000</a>
%t A088135 sfl[p_]:=Module[{idn=IntegerDigits[p]},idn[[1]]+idn[[-1]]]; sfl/@Prime[Range[90]] (* _Harvey P. Dale_, Jan 31 2023 *)
%Y A088135 Cf. A046704, A007953, A088133, A088134, A088136.
%K A088135 easy,nonn,base
%O A088135 1,1
%A A088135 _Zak Seidov_, Sep 20 2003