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 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. 0
 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 (list; table; graph; refs; listen; history; text; internal format)
 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

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Last modified October 2 22:30 EDT 2023. Contains 365841 sequences. (Running on oeis4.)