A365190 The weak Schur numbers for 2-coloring.

9, 24, 52, 101, 166, 253

Offset

2,1

Comments

a(8) >= 365, a(9) >= 505, a(10) >= 676 (see Table 4 at p. 6 in Ahmed et al.).

Links

Table of n, a(n) for n=2..7.

T. Ahmed, L. Boza, M. P. Revuelta, and M. I. Sanz, Exact values and lower bounds on the n-color weak Schur numbers for n=2,3. Ramanujan J (2023). See Table 3 at p. 4, Table 4 at p. 6, Sections 4.1 and 4.2 at pp. 10-13.

Crossrefs

Cf. A030126, A045652, A072842, A118771, A365191 (similar for 3-coloring).

Sequence in context: A001106 A023551 A022787 * A079770 A079771 A297225

Adjacent sequences: A365187 A365188 A365189 * A365191 A365192 A365193

Keyword

nonn,hard,more

Author

Stefano Spezia, Aug 25 2023

Status

approved