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 A035503 #15 Jul 08 2025 21:33:40 %S A035503 32,130,193,263,302,320,368,392,566,623,638,656,913,932,1030,1093, %T A035503 1115,1122,1152,1185,1212,1222,1258,1275,1300,1333,1448,1475,1512, %U A035503 1528,1575,1582,1725,1745,1755,1772,1785,1815,1852,1875,1881,1882,1903,1930,2063 %N A035503 Upper of pair of consecutive happy numbers. %D A035503 R. K. Guy, Unsolved Problems Number Theory, Sect. E34. %H A035503 Amiram Eldar, <a href="/A035503/b035503.txt">Table of n, a(n) for n = 1..10000</a> %Y A035503 Cf. A007770, A035502. %K A035503 nonn,easy,base %O A035503 1,1 %A A035503 _N. J. A. Sloane_ %E A035503 More terms from _Sascha Kurz_, Mar 24 2002