A063858 Triangle T(n,k) (n >= 2, k = 0..n-2) giving number of abstract dissection types of configurations of n points in n-k dimensions.

1, 1, 3, 1, 5, 8, 1, 7, 27, 46, 1, 9, 71, 1063, 790, 1, 11, 156, 44956, 1434219, 37829, 1, 13, 325

Offset

2,3

Links

Table of n, a(n) for n=2..25.

Lukas Finschi, Homepage of Oriented Matroids

L. Finschi and K. Fukuda, Complete combinatorial generation of small point set configurations and hyperplane arrangements, pp. 97-100 in Abstracts 13th Canadian Conference on Computational Geometry (CCCG '01), Waterloo, Aug. 13-15, 2001.

Example

Triangle begins
  1;
  1,3;
  1,5,8;
  1,7,27,46;
  ...

Crossrefs

Diagonals give A063859, A063860, A063861, A246992, A246993. Row sums give A063862.

Sequence in context: A340156 A340242 A116647 * A209831 A284367 A380886

Adjacent sequences: A063855 A063856 A063857 * A063859 A063860 A063861

Keyword

nonn,tabl,nice,more

Author

N. J. A. Sloane, Aug 26 2001

Status

approved