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 A083986 #10 Sep 29 2024 21:10:39 %S A083986 84,403,574,255,976,1207,162,1729,84,736,168,1300,806,216,1148,2668, %T A083986 403,736,1462,1855,252,2701,3154,1209,574,168,1462,270,1472,3478,336, %U A083986 4606,255,1300,1855,270,3640,1425,4930,5605,976,806,252,1472,3640,5092,2924 %N A083986 If k is a number with exactly two distinct decimal digits, say a and b, neither of which is 0 (i.e., a member of A101594), define the self-complement of k, SC(k), to be the number obtained by replacing a with b and vice versa. Then a(n) = lcm(A101594(n), SC(A101594(n))). %e A083986 a(7) = lcm(18, 81) = 162. %Y A083986 Cf. A083983, A083984, A083985. %Y A083986 Cf. A101594. %K A083986 base,nonn %O A083986 1,1 %A A083986 _Amarnath Murthy_, May 22 2003 %E A083986 Corrected and extended by _David Wasserman_, Dec 07 2004 %E A083986 Offset corrected by _Andrew Howroyd_, Sep 29 2024