OFFSET
1,6
COMMENTS
In a simple random walk on the square lattice, draw a unit square around each visited point. a(n)/A368001(n) is the probability that, when the appropriate number of distinct points have been visited, the drawn squares form a particular one of the fixed polyominoes corresponding to the free polyomino with binary code A246521(n+1).
Can be read as an irregular triangle, whose n-th row contains A000105(n) terms, n >= 1.
EXAMPLE
As an irregular triangle:
1;
1;
1, 1;
1, 4, 1, 1, 1;
97, 1, 1, 1, 8, 1, 1, 8, 8, 1, 1, 1;
...
CROSSREFS
KEYWORD
nonn,frac,tabf
AUTHOR
Pontus von Brömssen, Dec 09 2023
STATUS
approved