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 A109651 #9 Aug 09 2025 07:43:41 %S A109651 128,186,954,1462,2106,3535,3679,6439,8176,10032,10284,12632,54008, %T A109651 80600,86994,120006,124352,128554,148863,154260,157624,169799,181830, %U A109651 198789,247080,261199,315560,335825,339890,345676,346112,392886,397734,403040,416890,430492 %N A109651 Numbers k such that A109631(k) + A109631(k+1) = A109631(k+2). %Y A109651 Cf. A109631, A109715. %K A109651 nonn,base %O A109651 1,1 %A A109651 _Jason Earls_, Aug 05 2005 %E A109651 More terms from _Jinyuan Wang_, Aug 09 2025