A370257 Number of linear extensions of a 2 X n X n lattice.

1, 1, 48, 4877756, 6708527580006468, 424156225450423505435959050352, 3096938799441358561579846157094828974759254946464, 5484145364462132568306927625143954420041387365219384210732084836139460712

Offset

0,3

Links

Table of n, a(n) for n=0..7.

Formula

a(n) = A114715(n,n).

Crossrefs

Main diagonal of A114715.

Sequence in context: A282403 A254625 A165643 * A165047 A291865 A292517

Adjacent sequences: A370254 A370255 A370256 * A370258 A370259 A370260

Keyword

nonn

Author

Alois P. Heinz, Feb 13 2024

Status

approved