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 A297188 #12 Nov 30 2020 15:13:29 %S A297188 1,2,4,8,18,34,68,140,280,556,1114,2232,4468,8932,17860,35718,71446, %T A297188 142900,285800,571592,1143174,2286348,4572708,9145434,18290876, %U A297188 36581744,73163470,146326928,292653860,585307730,1170615490,2341231006,4682462012,9364923998 %N A297188 Sums of antidiagonals in A297359. %H A297188 Rémy Sigrist, <a href="/A297188/b297188.txt">Table of n, a(n) for n = 1..1000</a> %H A297188 Rémy Sigrist, <a href="/A297188/a297188.gp.txt">PARI program for A297188</a> %o A297188 (PARI) See Links section. %Y A297188 Cf. A297359. %K A297188 nonn %O A297188 1,2 %A A297188 _N. J. A. Sloane_, Dec 31 2017 %E A297188 More terms from _Rémy Sigrist_, Nov 30 2020