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A223831 T(n,k)=Number of nXk 0..2 arrays with rows and columns unimodal 7
3, 9, 9, 22, 81, 22, 46, 484, 484, 46, 86, 2116, 6166, 2116, 86, 148, 7396, 51136, 51136, 7396, 148, 239, 21904, 310396, 738482, 310396, 21904, 239, 367, 57121, 1492552, 7291180, 7291180, 1492552, 57121, 367, 541, 134689, 5995781, 54035194, 111026387 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
...3......9........22..........46............86.............148
...9.....81.......484........2116..........7396...........21904
..22....484......6166.......51136........310396.........1492552
..46...2116.....51136......738482.......7291180........54035194
..86...7396....310396.....7291180.....111026387......1215505987
.148..21904...1492552....54035194....1215505987.....18986502099
.239..57121...5995781...320423509...10278415020....222531132820
.367.134689..20879061..1590193515...70637615542...2068398813560
.541.292681..64727664..6823643014..409495177832..15880238812350
.771.594441.182215264.25942390362.2059270878998.103853282918692
LINKS
FORMULA
Empirical: columns k=1..7 are polynomials of degree 4*k
EXAMPLE
Some solutions for n=3 k=4
..1..2..0..0....0..0..1..1....0..2..2..0....1..2..1..0....0..1..1..1
..2..2..0..0....1..2..1..1....0..2..2..2....0..2..1..1....1..1..2..2
..0..2..1..0....0..0..1..1....0..0..2..2....0..1..2..2....0..1..2..1
CROSSREFS
Column 1 is A223718
Column 2 is A223719
Sequence in context: A238323 A223742 A223725 * A223885 A223892 A223789
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved

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Last modified March 2 20:47 EST 2024. Contains 370498 sequences. (Running on oeis4.)