A001293 Leech triangle: k-th number (0 <= k <= n) in n-th row (0 <= n) is number of octads in S(5,8,24) containing k given points and missing n-k given points.

759, 506, 253, 330, 176, 77, 210, 120, 56, 21, 130, 80, 40, 16, 5, 78, 52, 28, 12, 4, 1, 46, 32, 20, 8, 4, 0, 1, 30, 16, 16, 4, 4, 0, 0, 1, 30, 0, 16, 0, 4, 0, 0, 0, 1

Offset

0,1

References

F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 68.

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 278.

Handbook of Combinatorics, North-Holland '95, p. 720.

CRC Handbook of Combinatorial Designs, 1996, p. 69.

Links

Table of n, a(n) for n=0..44.

Index entries for sequences related to Steiner systems

Example

Triangle begins:
  759;
  506, 253;
  330, 176,  77;
  210, 120,  56,  21;
  130,  80,  40,  16,   5;
  ...

Crossrefs

Sequence in context: A104336 A157830 A105547 * A001380 A001920 A225022

Adjacent sequences: A001290 A001291 A001292 * A001294 A001295 A001296

Keyword

nonn,tabl,fini,full,nice

Author

N. J. A. Sloane

Status

approved