A347678 Triangle read by rows: T(n,k) (1 <= k <= n) = number of n X k Baxter matrices in which all row sums are 1.
1, 1, 2, 1, 6, 6, 1, 12, 32, 22, 1, 20, 100, 172, 92, 1, 30, 240, 744, 956, 422, 1, 42, 490, 2364, 5328, 5492, 2074, 1, 56, 896, 6174, 21236, 37618, 32490, 10754, 1, 72, 1512, 14056, 68030, 181140, 264612, 197144, 58202, 1, 90, 2400, 28896, 186462, 690444, 1497544, 1863222, 1222642, 326240
Offset: 1
Links
- Don Knuth, Baxter matrices, Preprint, Sep 05 2021.
- George Spahn, Counting Baxter Matrices, arXiv:2110.09688 [math.CO], 2021.
Extensions
a(29)-a(55) from Michael S. Branicky, Sep 17 2021