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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
1, 2, 16, 4, 128, 5728, 4, 1416, 580728, 758857152
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Graceful Labeling
Eric Weisstein's World of Mathematics, Grid Graph
EXAMPLE
Triangle begins:
n\k 1 2 3 4
-------------------------------
1: 1
2: 2 16
3: 4 128 5728
4: 4 1416 580728 758857152
CROSSREFS
First column: A006967; second column: A333719; diagonal: A337796.
Sequence in context: A348007 A025586 A087251 * A211367 A351585 A220314
KEYWORD
nonn,tabl,more
AUTHOR
EXTENSIONS
T(4,4) from Pontus von Brömssen, Nov 04 2020 (Copied from A337796.)
STATUS
approved