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 A038373 #31 Jul 15 2022 06:51:41
%S A038373 1,2,4,10,24,60,146,366,912,2302,5800,14722,37368,95304,243168,622518,
%T A038373 1594622,4094768,10521384,27085436,69768478,179982688,464564220,
%U A038373 1200563864,3104192722,8034256412,20803994184,53915334890,139785953076,362681515714,941361260956,2444866458524,6351963691964
%N A038373 Number of n-step self-avoiding paths on quadrant grid starting at quadrant origin.
%H A038373 Siqi Wang, <a href="/A038373/b038373.txt">Table of n, a(n) for n = 0..40</a>
%H A038373 A. J. Guttmann and G. M. Torrie, <a href="https://doi.org/10.1088/0305-4470/17/18/023">Critical behavior at an edge for the SAW and Ising model</a>, J. Phys. A 17 (1984), 3539-3552. See series coefficients c_{n}^{2} for square lattice with wedge angle Pi/2.
%F A038373 a(n) = 2 * A046170(n) for n >= 1. - _Siqi Wang_, Jul 15 2022
%Y A038373 Cf. A034010, A001411, A046170.
%K A038373 nonn,walk
%O A038373 0,2
%A A038373 _David W. Wilson_
%E A038373 a(25)-a(32) from _Bert Dobbelaere_, Jan 05 2019