A217037 Van der Waerden numbers w(2;5,n).

178, 206, 260

Offset

5,1

Comments

w(2;5,5)=178 (Stevens and Shantaram, 1978),w(2;5,6)=206 (Kouril, 2006), and w(2;5,7)=260 (Ahmed).

References

M. Kouril, A Backtracking Framework for Beowulf Clusters with an Extension to Multi-Cluster Computation and Sat Benchmark Problem Implementation, Ph. D. Thesis, University of Cincinnati, Engineering: Computer Science and Engineering, 2006.

Links

Table of n, a(n) for n=5..7.

T. Ahmed, Some More van der Waerden Numbers

T. Ahmed, Some more Van der Waerden numbers, J. Int. Seq. 16 (2013) 13.4.4

R. Stevens and R. Shantaram, Computer-generated van der Waerden partitions, Math. Computation, 32 (1978), 635-636.

Example

w(2;5,5)=178.

Crossrefs

Cf. A171081, A171082.

Sequence in context: A053018 A046436 A114081 * A224600 A279093 A297400

Adjacent sequences: A217034 A217035 A217036 * A217038 A217039 A217040

Keyword

nonn,bref,hard,more

Author

Tanbir Ahmed, Sep 24 2012

Status

approved