A331138 Triangle read by rows: T(n,k) (n>=3, k>=1) = length of shortest code realizing a synch-set S(n,k).

4, 7, 5, 12, 7, 6, 18, 10, 8, 7, 26, 14, 11, 9, 8, 35, 19, 14, 11, 10, 9, 45

Offset

3,1

References

Simmons, G. J., Synch sets: A variant of difference sets. Report No. SLA-74-5068; CONF-740217-1. Sandia Labs., Albuquerque, N. Mex.(USA), 1974. Also in Proceedings of the Fifth Southeastern Conference on Combinatorics, Graph Theory and Computing (Florida Atlantic Univ., Boca Raton, Fla., 1974), pp. 625-645. Congressus Numerantium, No. X, Utilitas Math., Winnipeg, Man., 1974. MR0357160 (50 #9628)

Links

Table of n, a(n) for n=3..24.

Example

Triangle begins:
   4;
   7,  5;
  12,  7,  6;
  18, 10,  8,  7;
  26, 14, 11,  9,  8;
  35, 19, 14, 11, 10,  9;
  45, ...
  ...

Crossrefs

The first column appears to be A227590.

Sequence in context: A341672 A346836 A046549 * A051544 A271304 A271124

Adjacent sequences: A331135 A331136 A331137 * A331139 A331140 A331141

Keyword

nonn,tabl,more

Author

N. J. A. Sloane, Jan 12 2020

Status

approved