Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #7 Jan 10 2024 23:55:00
%S 2,0,4,3,0,0,9,3,0,9,4,7,2,1,0,6,2,1,1,5,2,7,4,5,0,7,4,6,1,4,7,5,7,7,
%T 0,6,8,3,4,9,5,3,5,2,4,7,0,5,6,3,7,9,1,1,2,0,4,2,3,8,1,2,9,5,7,4,2,7,
%U 2,6,9,8,6,2,9,8,8,1,5,5,9,9,0,6,1,1,2,4,8,7,8,5,9,8,2,3,1,1,0,7
%N Decimal expansion of the probability that the T 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 (286720 - 520576*Pi + 365408*Pi^2 - 125052*Pi^3 + 20982*Pi^4 - 1386*Pi^5)/(1204224 - 2114560*Pi + 1452608*Pi^2 - 490176*Pi^3 + 81507*Pi^4 - 5355*Pi^5).
%F A368665 + A368666 + A368667 + A368668 + A368669 = 1.
%e 0.204300930947210621152745074614757706834953524705637911204238...
%Y 7th row of A368660.
%Y Cf. A368665, A368666, A368668, A368669.
%K nonn,cons
%O 0,1
%A _Pontus von Brömssen_, Jan 04 2024