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 A379823 #3 Jan 06 2025 10:50:29 %S A379823 1,1,4,17,76,352,1667,8017,38992,191276,944648,4690688,23396023, %T A379823 117130483,588267604,2962532945,14954741680,75647585152,383359922324, %U A379823 1945925312492,9891894347360,50350481125000,256592858798416,1309047896676352,6684914267741951,34168808617063927 %N A379823 a(n) = (-1)^n * hypergeom([-n, n/2 + 1, n/2 + 1/2], [1, n + 2], 4). Central terms of A379907. %p A379823 seq(simplify((-1)^n*hypergeom([-n, n/2 + 1, n/2 + 1/2], [1, n + 2], 4)), n = 0..25); %Y A379823 Cf. A379907. %K A379823 nonn %O A379823 0,3 %A A379823 _Peter Luschny_, Jan 06 2025