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 A069671 #8 May 13 2024 00:06:28 %S A069671 1,10,120,2211,10011,112101,2001000,10006101,200010000,1210000221, %T A069671 20000100000,210010000005,2000001000000,32000004000000, %U A069671 200000010000000,3200000040000000,20000000100000000,320000000400000000,2000000001000000000,32000000004000000000 %N A069671 Smallest n-digit triangular number with minimum digit sum. %C A069671 Does the obvious pattern continue? - _Vladeta Jovovic_, Apr 07 2002 %Y A069671 Cf. A069661, A069662, A069663, A069664, A069665, A069666, A069667, A069668, A069669, A069670. %K A069671 nonn,base %O A069671 1,2 %A A069671 _Amarnath Murthy_, Apr 06 2002 %E A069671 More terms from _Vladeta Jovovic_, Apr 07 2002 %E A069671 More terms from _Sean A. Irvine_, May 12 2024