OFFSET
1,5
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..96
Don Knuth, Baxter matrices, Preprint, Sep 05 2021.
George Spahn, Counting Baxter Matrices, arXiv:2110.09688 [math.CO], 2021.
FORMULA
a(n) <= A347672(n). - Michael S. Branicky, Sep 15 2021
EXAMPLE
The array begins:
1,1,1,1,1,1,1, ...
1,4,8,12,16,20,24, ...
1,8,26,55,96,149,214, ...
1,12,55,156,354,688,1198, ...
1,16,96,354,1037,2533,5383, ...
1,20,149,688,2533,7632,19522, ...
1,24,214,1198,5383,19522,59020, ...
...
The first few antidiagonals are:
1,
1,1,
1,4,1,
1,8,8,1,
1,12,26,12,1,
1,16,55,55,16,1,
1,20,96,156,96,20,1,
1,24,149,354,354,149,24,1,
1,28,214,688,1037,688,214,28,1,
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Sep 10 2021
EXTENSIONS
a(45)-a(66) from Michael S. Branicky, Sep 14 2021
STATUS
approved