OFFSET
2,1
COMMENTS
For the meaning of Skolem number of a graph, see Definitions 1.4 and 1.5 in Carrigan and Green.
LINKS
Braxton Carrigan and Garrett Green, Skolem Number of Subgraphs on the Triangular Lattice, Communications on Number Theory and Combinatorial Theory 2 (2021), Article 2.
FORMULA
EXAMPLE
The triangle T(n, k) begins:
n\k| 2 3 4 5 6 7
---+------------------------
2 | 2
3 | 3 4
4 | 4 6 8
5 | 5 8 11 14
6 | 6 10 14 18 22
7 | 7 12 17 22 27 32
...
MATHEMATICA
T[n_, k_]:=k*n-2k-n+4; Table[T[n, k], {n, 2, 13}, {k, 2, n}]//Flatten
CROSSREFS
KEYWORD
AUTHOR
Stefano Spezia, Mar 30 2021
STATUS
approved