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 A263202 #22 Apr 07 2017 11:38:57 %S A263202 7,1,5,5,3,3,9,1,3,3,9,2,6,0,5,5,1,2,8,2,1,0,0,1,7,6,1,6,8,3,3,1,3,9, %T A263202 2,8,0,6,6,9,1,9,9,5,8,5,7,7,6,9,7,7,9,2,0,3,4,9,4,2,4,9,0,4,7,4,4,3, %U A263202 3,3,1,2,2,5,0,9,2,5,3,3,7,5,4,8,7,5 %N A263202 Decimal expansion of the lowest Dirichlet eigenvalue of the Laplacian within the unit-edged regular hexagon. %H A263202 Robert Stephen Jones, <a href="/A263202/b263202.txt">Table of n, a(n) for n = 1..1001</a> %H A263202 L. Bauer and E. L. Reiss, <a href="http://www.researchgate.net/publication/202846469_Cutoff_Wavenumbers_and_Modes_of_Hexagonal_Waveguides">Cutoff wavenumbers and modes of hexagonal waveguides</a>, SIAM J. of Appl. Math., 35 (1978), 508-514. (Note: 6-digit results.) %H A263202 L. M. Cureton and J. R. Kuttler, <a href="http://dx.doi.org/10.1006/jsvi.1998.1919">Eigenvalues of the Laplacian on regular polygons and polygons resulting from their dissection</a>, Journal of Sound and Vibration, 220 (1998), 83-98. (Note: Table 2 presents their 8-digit digit results.) %H A263202 Robert S. Jones, <a href="http://arxiv.org/abs/1602.08636">Computing ultra-precise eigenvalues of the Laplacian within polygons</a>, arXiv preprint arXiv:1602.08636, 2016 %e A263202 7.1553391339260551282100176168331392806691995857769779... %Y A263202 Cf. A262701 (L-shape) and A262823 (regular pentagon). %K A263202 nonn,cons %O A263202 1,1 %A A263202 _Robert Stephen Jones_, Oct 12 2015