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 A073421 #6 Nov 28 2024 19:16:07 %S A073421 18,666,23994,679,31,1134,40842,1470330,681,33,1206,43434,1563642, %T A073421 43447,1219,43902,1580490,56897658,43449,1221,43974,1583082,56990970, %U A073421 1583095,43987,1583550,57007818,2052281466,1583097,43989,1583622,57010410,2052374778,57010423,1583635 %N A073421 Roman numerals for n evaluated as if in base 36. %D A073421 M. J. Halm, Sequences (Re)discovered, Mpossibilities 81 (Aug. 2002). %e A073421 a(2) = 666 because 666 is the value of "II" in base 36. %Y A073421 Cf. A072922. %K A073421 base,easy,nonn %O A073421 1,1 %A A073421 _Michael Joseph Halm_, Aug 23 2002 %E A073421 Missing a(14)-a(19) inserted by _Sean A. Irvine_, Nov 28 2024