%I #7 Jan 10 2024 23:55:05
%S 1,5,1,7,7,9,4,3,8,2,7,3,7,3,4,8,2,6,7,3,8,9,8,9,3,4,0,9,3,2,0,3,2,8,
%T 6,2,5,9,1,1,3,1,0,8,2,4,6,1,1,7,0,1,6,3,2,9,0,6,6,7,9,9,1,8,8,4,1,3,
%U 9,7,1,5,7,4,6,7,1,4,4,3,0,8,8,6,0,5,9,8,6,5,5,3,4,0,5,3,1,7,6,1
%N Decimal expansion of the probability that the skew tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.
%C See A368660 for details.
%H <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>.
%F Equals (3200 - 5560*Pi + 3370*Pi^2 - 867*Pi^3 + 81*Pi^4)/(21504 - 32000*Pi + 17368*Pi^2 - 4101*Pi^3 + 357*Pi^4).
%F A368665 + A368666 + A368667 + A368668 + A368669 = 1.
%e 0.151779438273734826738989340932032862591131082461170163290667...
%Y 8th row of A368660.
%Y Cf. A368665, A368666, A368667, A368669.
%K nonn,cons
%O 0,2
%A _Pontus von Brömssen_, Jan 04 2024