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 A080268 #6 Jan 11 2024 09:40:46 %S A080268 2,56,968,249728,3996680,1023152000,261926931584,17165643396644864, %T A080268 274650294346579976,70310475352724475776,17999481690297465818240, %U A080268 1179614032055334719872532480,301981192206165688287372558464 %N A080268 Breadth-first-wise A014486-like encoding of the stunted binomial-mod-2 zigzag trees (A080263). %F A080268 a(n) = A014486(A080270(n)) %Y A080268 Same sequence in decimal: A080269. %K A080268 nonn %O A080268 0,1 %A A080268 _Antti Karttunen_, Mar 02 2003