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%I #15 Jan 17 2020 16:07:15
%S 3,2,0,5,5,6,9,4,3,0,4,0,0,5,9,0,3,1,1,7,0,2,0,2,8,6,1,7,7,8,3,8,2,3,
%T 4,2,6,3,7,7,1,0,8,9,1,9,5,9,7,6,9,9,4,4,0,4,7,0,5,5,2,2,0,3,5,5,1,8,
%U 3,4,7,9,0,3,5,9,1,6,7,4,6,9,1,7,6,4,1,8,2,6,9,5,7,8,0,5,2,5,0,7,8,4,9,9
%N Decimal expansion of 'v', an auxiliary constant associated with the asymptotic number of row-convex polyominoes.
%C Essentially the same digit sequence as A137421. - _R. J. Mathar_, Sep 06 2014
%H Steven R. Finch, <a href="http://arxiv.org/abs/2001.00578">Errata and Addenda to Mathematical Constants.</a> p. 48.
%F v = first root of x^3 - 5*x^2 + 7*x - 4 = (x-2)^3+(x-2)^2-(x-2)-2.
%F A001169(n) ~ u*v^n, where u = A246772.
%e 3.20556943040059031170202861778382342637710891959769944...
%t v = Root[x^3 - 5*x^2 + 7*x - 4, x, 1]; RealDigits[v, 10, 104] // First
%Y Cf. A001169, A006958, A067675, A246772.
%K nonn,cons,easy
%O 1,1
%A _Jean-François Alcover_, Sep 03 2014
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