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 A160909 #7 Sep 08 2022 08:45:45 %S A160909 2,3,10,28,198,520,3570,9348,64078,1149850,3010348,54018520,370248450, %T A160909 969323028,6643838878,119218851370,2139295485798,5600748293800, %U A160909 100501350283428,688846502588398,1803423556807920,32361122672259148 %N A160909 Row sums of triangle defined in A096539. %F A160909 a(n) = A180363(n) - 1. - _Jon Maiga_, Jul 24 2019 %o A160909 (Magma) [ &+[ Binomial(n-k, k)+Binomial(n-k-1, k-1): k in [1..n div 2] ]: n in [1..80] | IsPrime(n) ]; %Y A160909 Cf. A096539, A034807, A180363. %K A160909 nonn %O A160909 1,1 %A A160909 _Klaus Brockhaus_, May 29 2009