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 A164866 #5 Jul 22 2025 07:18:37 %S A164866 1,1,101,1,102,10201,1,103,10303,1030301,1,104,10406,1040604, %T A164866 104060401,1,105,10510,1051010,105101005,10510100501,1,106,10615, %U A164866 1061520,106152015,10615201506,1061520150601 %N A164866 (101^n,1)-Pascal triangle. %e A164866 Triangle begins: %e A164866 1 %e A164866 1,101 %e A164866 1,102,10201 %e A164866 1,103,10303,1030301 %e A164866 1,104,10406,1040604,104060401 %e A164866 1,105,10510,1051010,105101005,10510100501 %e A164866 1,106,10615,1061520,106152015,10615201506,1061520150601 %Y A164866 Cf. A164847, A007318 %K A164866 nonn,tabl %O A164866 1,3 %A A164866 _Mark Dols_, Aug 28 2009