login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A187618
Triangle T(m,n) read by rows: number of domino tilings of the 2m X 2n grid (0 <= m <= n).
7
1, 1, 2, 1, 5, 36, 1, 13, 281, 6728, 1, 34, 2245, 167089, 12988816, 1, 89, 18061, 4213133, 1031151241, 258584046368, 1, 233, 145601, 106912793, 82741005829, 65743732590821, 53060477521960000, 1, 610, 1174500, 2720246633, 6675498237130, 16848161392724969, 43242613716069407953, 112202208776036178000000
OFFSET
0,3
COMMENTS
A099390 is the main entry for this problem.
EXAMPLE
Triangle begins:
1
1 2
1 5 36
1 13 281 6728
1 34 2245 167089 12988816
1 89 ...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Mar 12 2011
EXTENSIONS
More terms from Nathaniel Johnston, Mar 22 2011
STATUS
approved