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 A167564 #4 Jul 22 2025 07:29:20 %S A167564 1,3,11,47,241,1457,10223,81835,736637,7366661,81034027,972410303, %T A167564 12641339465,176978768137,2654681568551,42474905237267, %U A167564 722073389475733,12997321011978125,246949099232271587,4938981984661217191 %N A167564 The row sums of the ED2 array A167560 read by antidiagonals. %Y A167564 A167560 is the ED2 array. %K A167564 easy,nonn %O A167564 1,2 %A A167564 _Johannes W. Meijer_, Nov 10 2009