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 A382169 #12 Apr 01 2025 19:33:07 %S A382169 0,1,7,17,38,74,119,185,263,368,504,657,847,1078,1331,1631,1956,2334, %T A382169 2769,3234,3762,4323,4953,5656,6397,7217,8120,9066,10101,11182,12358, %U A382169 13633,14959,16390,17930,19526,21237,23007,24898,26914,28994,31205,33483,35898 %N A382169 A382168 with duplicates removed. %C A382169 Is there any other characterization of these numbers? %C A382169 First differences are triangular numbers whose indices (in A000217) are 1,3,4,6,8,9,11,12,14,16,17,19,21,22,24,25,27,29,30,32,33,35,37,38,40,42. - _Ivan N. Ianakiev_, Apr 01 2025 %Y A382169 Cf. A000217, A019444, A382168. %K A382169 nonn %O A382169 1,3 %A A382169 _N. J. A. Sloane_, Mar 31 2025 %E A382169 More terms from _Pontus von Brömssen_, Apr 01 2025