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 A048218 #8 Jun 06 2021 02:52:35 %S A048218 4,10,18,27,39,54,70,90,112,136,161,187,219,252,286,323,361,402,447, %T A048218 494,542,595,651,710,771,833,897,965,1034,1108,1184,1261,1339,1420, %U A048218 1504,1591,1679,1768,1864,1962,2062,2165,2270,2376 %N A048218 a(n)=T(n+2,n), array T given by A048212. %F A048218 a(n) = A004979(n + 3) - 4. - _Sean A. Irvine_, Jun 05 2021 %Y A048218 Cf. A004979. %K A048218 nonn %O A048218 1,1 %A A048218 _Clark Kimberling_