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 A348054 #7 Oct 21 2021 01:47:53
%S A348054 49,119,189,259,289,329,399,459,469,539,609,629,679,729,749,799,819,
%T A348054 889,959,969,999,1029,1099,1139,1169,1239,1269,1309,1369,1379,1449,
%U A348054 1479,1519,1539,1589,1649,1659,1729,1739,1799,1809,1819,1869,1939,1989,2009,2079,2109
%N A348054 Positive integers that are the product of two integers ending with 7.
%F A348054 Lim_{n->infinity} a(n)/a(n-1) = 1.
%e A348054 49 = 7*7, 119 = 7*17, 189 = 7*27, 259 = 7*37, 289 = 17*17, 329 = 7*47, 399 = 7*57, ...
%t A348054 a={}; For[n=0, n<=210, n++, For[k=0, k<=n, k++, If[Mod[10*n+9, 10*k+7]==0 && Mod[(10*n+9)/(10*k+7), 10]==7 && 10*n+9>Max[a], AppendTo[a, 10*n+9]]]]; a
%o A348054 (Python)
%o A348054 def aupto(lim): return sorted(set(a*b for a in range(7, lim//7+1, 10) for b in range(a, lim//a+1, 10)))
%o A348054 print(aupto(2110)) # _Michael S. Branicky_, Sep 26 2021
%Y A348054 Cf. A017377 (supersequence), A053742 (ending with 5), A139245 (ending with 2), A324297 (ending with 6), A346950 (ending with 3), A347253 (ending with 4), A348055.
%K A348054 nonn,base
%O A348054 1,1
%A A348054 _Stefano Spezia_, Sep 26 2021