A381243 Number of hyperplanes defined by the nonzero differences of two permutations of order n.

0, 0, 1, 6, 85, 1370, 30481, 778610, 24409645, 881325366, 36635553601, 1713454403210, 89415912126223, 5143372266050837, 323667807885619744, 22112062644980805684

Offset

0,4

Comments

Each of A175176(n) - 1 nonzero differences between two permutations (viewed as vectors) defines a hyperplane in the n-dimensional space. a(n) gives the number of pairwise distinct hyperplanes among them.

Links

Table of n, a(n) for n=0..15.

Crossrefs

Cf. A019589, A175176, A362968, A381244, A381339.

Sequence in context: A290011 A164266 A136597 * A064329 A187740 A332407

Adjacent sequences: A381240 A381241 A381242 * A381244 A381245 A381246

Keyword

nonn,more

Author

Max Alekseyev, Feb 17 2025

Status

approved