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 A223975 T(n,k)=Number of nXk 0..2 arrays with rows and antidiagonals unimodal 12
 3, 9, 9, 22, 81, 27, 46, 484, 729, 81, 86, 2116, 9515, 6561, 243, 148, 7396, 76092, 186004, 59049, 729, 239, 21904, 440628, 2558848, 3628696, 531441, 2187, 367, 57121, 2026448, 22935921, 84988435, 70779056, 4782969, 6561, 541, 134689, 7829639 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .....3..........9.............22...............46.................86 .....9.........81............484.............2116...............7396 ....27........729...........9515............76092.............440628 ....81.......6561.........186004..........2558848...........22935921 ...243......59049........3628696.........84988435.........1140963027 ...729.....531441.......70779056.......2809740785........55803232969 ..2187....4782969.....1380511272......92756321858......2708281019793 ..6561...43046721....26926081924....3060966419662....131014406127439 .19683..387420489...525177301935..100999995564503...6329626912147424 .59049.3486784401.10243271456697.3332485315028073.305632588672082728 LINKS R. H. Hardin, Table of n, a(n) for n = 1..286 FORMULA Empirical: columns k=1..6 have recurrences of order 1,1,7,18,43,91 Empirical: rows n=1..7 are polynomials of degree 4*n for k>0,0,0,0,2,3,4 EXAMPLE Some solutions for n=3 k=4 ..0..2..0..0....1..2..2..1....2..1..1..0....1..2..2..0....0..0..0..0 ..0..1..2..1....0..0..1..1....1..2..2..2....0..2..1..0....0..2..2..0 ..0..1..2..2....0..1..0..0....0..1..1..2....1..1..0..0....0..2..1..1 CROSSREFS Column 1 is A000244 Column 2 is A001019 Row 1 is A223718 Row 2 is A223719 Sequence in context: A223885 A223892 A223789 * A226852 A207235 A207228 Adjacent sequences:  A223972 A223973 A223974 * A223976 A223977 A223978 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 30 2013 STATUS approved

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Last modified September 28 08:23 EDT 2020. Contains 337394 sequences. (Running on oeis4.)