A368668 -id:A368668 - cp's OEIS frontend

A368660 Square array read by antidiagonals; the n-th row is the decimal expansion of the probability that the free polyomino with binary code A246521(n+1) appears in diffusion-limited aggregation on the square lattice.

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

Offset: 1

Pontus von Brömssen, Jan 02 2024

Given the current set of cells in a diffusion-limited aggregation process on the square lattice, with new cells coming in from infinity, the probability that the next cell appears in a given position can be found by "Spitzer's recipe" (see Spitzer (1976) and Wolf (1991)). These probabilities can then be aggregated to probabilities for each polyomino to appear.
Each row corresponds to a number in the field Q(Pi), i.e., a number of the form (Sum_{i=0..j} p_i*Pi^i)/(Sum_{i=0..k} q_i*Pi^i), with p_i and q_i integers.
Rows A130866(k-1)+1 to A130866(k) correspond to k-celled polyominoes, k >= 2. The sum of the numbers on those rows is 1.

			Array begins:
  1.00000000000000000000... (monomino)
  1.00000000000000000000... (domino)
  0.57268748908837848701... (L tromino)
  0.42731251091162151298... (I tromino)
  0.42649395750130487018... (L tetromino)
  0.05462942885357382723... (square tetromino)
  0.20430093094721062115... (T tetromino)
  0.15177943827373482673... (S tetromino)
  0.16279624442417585468... (I tetromino)
  0.13219133154126607406... (P pentomino)
  0.06837364801045779482... (V pentomino)
  0.03733461160442202363... (W pentomino)
  0.14605587435506817264... (L pentomino)
  0.15786504558818518196... (Y pentomino)
  0.10529476741119453953... (N pentomino)
  0.04279427184030725060... (U pentomino)
  0.08270007323598911231... (T pentomino)
  0.10865945602909460112... (F pentomino)
  0.04929714951722524019... (Z pentomino)
  0.01279646275569121440... (X pentomino)
  0.05663730811109879467... (I pentomino)
  ...

Frank Spitzer, Principles of Random Walk, 2nd edition, Springer, 1976. See Chapter III.

Pontus von Brömssen, Table of n, a(n) for n = 1..1596 (first 56 antidiagonals).
Pontus von Brömssen, First 12 decimal digits and exact values of the form (Sum_{i=0..j} p_i*Pi^i)/(Sum_{i=0..k} q_i*Pi^i) for rows 1..56.
Wikipedia, Diffusion-limited aggregation.
Marek Wolf, Hitting probabilities of diffusion-limited-aggregation clusters, Physical Review A 43 (1991), 5504-5517; ResearchGate link.
Index entries for sequences related to polyominoes.

Cf. A000105, A130866, A246521, A368661, A368662, A368863 (fixed polyominoes).
Rows 3-9 are A368663, A368664, A368665, A368666, A368667, A368668, A368669.
Corresponding sequences for internal diffusion-limited aggregation: A368386, A368387.

A368665 Decimal expansion of the probability that the L tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

Original entry on oeis.org

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

Offset: 0

Pontus von Brömssen, Jan 04 2024

See A368660 for details.

			0.426493957501304870185842561289148822006185205656733654816895...

5th row of A368660.
4th row of A368662.
Cf. A368666, A368667, A368668, A368669.

Equals (4644864 - 9252864*Pi + 7592128*Pi^2 - 3288992*Pi^3 + 794310*Pi^4 - 101490*Pi^5 + 5364*Pi^6)/(19267584 - 39854080*Pi + 33814528*Pi^2 - 15105856*Pi^3 + 3754992*Pi^4 - 493215*Pi^5 + 26775*Pi^6).

A368665 + A368666 + A368667 + A368668 + A368669 = 1.

A368666 Decimal expansion of the probability that the square tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

Original entry on oeis.org

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

Offset: 0

Pontus von Brömssen, Jan 04 2024

See A368660 for details.

			0.054629428853573827239911022139511937690229708268246906359282...

6th row of A368660.
4th row of A368661.
Cf. A368665, A368667, A368668, A368669.

Equals (7680 - 10744*Pi + 5572*Pi^2 - 1272*Pi^3 + 108*Pi^4)/(21504 - 32000*Pi + 17368*Pi^2 - 4101*Pi^3 + 357*Pi^4).

A368665 + A368666 + A368667 + A368668 + A368669 = 1.

A368667 Decimal expansion of the probability that the T tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

Original entry on oeis.org

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, 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, 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

Offset: 0

Pontus von Brömssen, Jan 04 2024

See A368660 for details.

			0.204300930947210621152745074614757706834953524705637911204238...

7th row of A368660.

Cf. A368665, A368666, A368668, A368669.

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).

A368665 + A368666 + A368667 + A368668 + A368669 = 1.

A368669 Decimal expansion of the probability that the straight tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

Original entry on oeis.org

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

Offset: 0

Pontus von Brömssen, Jan 04 2024

See A368660 for details.

			0.162796244424175854682512001024548670877500478908211364328916...

9th row of A368660.

Cf. A368665, A368666, A368667, A368668.

First[RealDigits[2*(Pi - 4)^2*(3*Pi - 10)/((5*Pi - 16)*(7*Pi - 24)*(15*Pi - 56)), 10, 100]] (* Paolo Xausa, Nov 12 2024 *)

Equals (320 - 256*Pi + 68*Pi^2 - 6*Pi^3)/(21504 - 18752*Pi + 5440*Pi^2 - 525*Pi^3).

A368665 + A368666 + A368667 + A368668 + A368669 = 1.

cp's OEIS Frontend

A368660 Square array read by antidiagonals; the n-th row is the decimal expansion of the probability that the free polyomino with binary code A246521(n+1) appears in diffusion-limited aggregation on the square lattice.

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A368665 Decimal expansion of the probability that the L tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

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A368666 Decimal expansion of the probability that the square tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

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A368667 Decimal expansion of the probability that the T tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

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A368669 Decimal expansion of the probability that the straight tetromino appears when the 4th cell is added in diffusion-limited aggregation on the square lattice.

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