A336833 Triangle read by rows, 1 <= k <= n: T(n,k) is the number of graceful labelings of the n X k grid graph.

1, 2, 16, 4, 128, 5728, 4, 1416, 580728, 758857152

Offset: 1

Author

Pontus von Brömssen, Aug 05 2020

Keywords

• nonn
• tabl
• more

Examples

			Triangle begins:
  n\k  1    2      3          4
-------------------------------
  1:   1
  2:   2   16
  3:   4  128   5728
  4:   4 1416 580728  758857152
		

Links

• Eric Weisstein's World of Mathematics, Graceful Labeling
• Eric Weisstein's World of Mathematics, Grid Graph
• Wikipedia, Graceful labeling

Crossrefs

First column: A006967; second column: A333719; diagonal: A337796.

Extensions

T(4,4) from Pontus von Brömssen, Nov 04 2020 (Copied from A337796.)