A246772 - OEIS

%I #12 Nov 05 2025 15:22:27

%S 1,8,0,9,1,5,5,0,1,8,8,1,5,6,0,6,0,9,5,1,5,8,9,5,7,7,3,0,1,0,0,0,1,8,

%T 0,0,4,9,4,4,2,9,1,0,3,3,9,9,8,8,1,0,0,0,4,9,9,5,9,4,8,3,2,4,4,3,8,9,

%U 8,1,7,8,0,8,2,4,5,6,3,2,8,6,5,8,4,2,9,4,6,2,4,4,0,7,4,9,0,4,9,1,1,5,5

%N Decimal expansion of 'u', an auxiliary constant associated with the asymptotic number of row-convex polyominoes.

%H Steven R. Finch, <a href="https://arxiv.org/abs/2001.00578">Errata and Addenda to Mathematical Constants.</a> p. 48.

%F u = first root of 944*x^3 - 295*x^2 + 28*x - 1.

%F A001169(n) ~ u*v^n, where v = A246773.

%e 0.180915501881560609515895773010001800494429103399881...

%t u = Root[944*x^3 - 295*x^2 + 28*x - 1, x, 1]; RealDigits[u, 10, 103] // First

%Y Cf. A001169, A006958, A067675, A246773.

%K nonn,cons,easy

%O 0,2

%A _Jean-François Alcover_, Sep 03 2014