A320443 Number of lattice paths from {n}^n to {0}^n using steps that decrement one component by 1 such that for each point p we have abs(p_{i}-p_{(i mod n)+1}) <= 1 and the first component used is p_1.

1, 1, 2, 72, 162000, 34907788800, 1178106009360998400, 8852509935316882311338419200, 20266951127950378632425380239663945561600, 18451222767137832036294073367248809725255450206074566400, 8461986175729341705763214274355536481199826590348664142270203923137228800

Offset

0,3

Links

Table of n, a(n) for n=0..10.

Formula

a(n) = A318191(n,n).

Crossrefs

Main diagonal of A318191.

Sequence in context: A067689 A308941 A244148 * A079478 A367492 A221709

Adjacent sequences: A320440 A320441 A320442 * A320444 A320445 A320446

Keyword

nonn

Author

Alois P. Heinz, Jan 09 2019

Status

approved