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A337265
Array read by antidiagonals: T(m,n) (m>=0, n>=0) = 3 if there is both an edge upward from grid point (m,n) in the Even Conant lattice and an edge to the right; = 2 if there is only an edge upward; = 1 if there is only an edge to the right; = 0 if neither of those edges are present.
5
3, 3, 3, 3, 2, 3, 3, 1, 3, 3, 3, 1, 2, 2, 3, 3, 3, 2, 2, 3, 3, 3, 2, 1, 3, 3, 2, 3, 3, 1, 0, 1, 2, 1, 3, 3, 3, 1, 1, 0, 2, 0, 2, 2, 3, 3, 3, 1, 3, 3, 0, 3, 2, 3, 3, 3, 2, 3, 2, 2, 1, 2, 2, 3, 2, 3, 3, 1, 3, 1, 3, 0, 2, 2, 3, 1, 3, 3, 3, 1, 2, 1, 1, 1, 3, 3, 3, 1, 2, 2, 3
OFFSET
0,1
COMMENTS
In other words, T(m,n) = 2*v(m,n)+h(m,n), where v is given in A337263 and h is in A337264.
The '3' entries are in one-to-one correspondence with the cells in the Even Conant Lattice (see A328080).
LINKS
N. J. A. Sloane, Notes on the Conant Gasket, the Conant Lattice, and Associated Sequences, Preliminary version, Aug 23 2020
N. J. A. Sloane, The Even Conant Lattice (The grid points (m,n) are labeled with pairs v(m,n), h(m,n).)
EXAMPLE
The array begins as follows. The rows are shown in the appropriate order for looking at the first quadrant (that is, row 0 is at the bottom, then row 1, and so on):
r
row 7 = 3, 1, 1, 2, 3, 1, 2, 0, 3, 2, 0, 0, 3, 2, 3, 2, ...
row 6 = 3, 1, 1, 3, 2, 0, 3, 1, 2, 2, 0, 0, 3, 3, 2, 2, ...
row 5 = 3, 2, 0, 0, 3, 1, 2, 3, 2, 3, 1, 1, 2, 0, 3, 2, ...
row 4 = 3, 3, 1, 1, 2, 0, 2, 2, 3, 3, 1, 1, 2, 0, 2, 2, ...
row 3 = 3, 1, 2, 3, 2, 0, 3, 2, 3, 1, 2, 3, 2, 0, 3, 2, ...
row 2 = 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 2, ...
row 1 = 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, ...
row 0 = 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, ...
The initial antidiagonals (starting in the bottom left corner) are:
[3]
[3, 3]
[3, 2, 3]
[3, 1, 3, 3]
[3, 1, 2, 2, 3]
[3, 3, 2, 2, 3, 3]
[3, 2, 1, 3, 3, 2, 3]
[3, 1, 0, 1, 2, 1, 3, 3]
[3, 1, 1, 0, 2, 0, 2, 2, 3]
[3, 3, 1, 3, 3, 0, 3, 2, 3, 3]
[3, 2, 3, 2, 2, 1, 2, 2, 3, 2, 3]
[3, 1, 3, 1, 3, 0, 2, 2, 3, 1, 3, 3]
[3, 1, 2, 1, 1, 1, 3, 3, 3, 1, 2, 2, 3]
...
MAPLE
For Maple code see my "Notes".
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Aug 22 2020
STATUS
approved