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 A223826 Number of nX3 0..2 arrays with rows and columns unimodal 1
 22, 484, 6166, 51136, 310396, 1492552, 5995781, 20879061, 64727664, 182215264, 472897132, 1144905802, 2610251996, 5646952970, 11664925145, 23128319257, 44207709722, 81762385076, 146787187114, 256501341004, 437310109972 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A223831 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (5051/239500800)*n^12 + (17911/39916800)*n^11 + (113633/21772800)*n^10 + (27157/725760)*n^9 + (1331621/7257600)*n^8 + (36461/57600)*n^7 + (35192219/21772800)*n^6 + (2190431/725760)*n^5 + (24210049/5443200)*n^4 + (4187689/907200)*n^3 + (882989/207900)*n^2 + (2173/990)*n + 1 EXAMPLE Some solutions for n=3 ..0..0..2....1..2..0....1..0..0....2..0..0....1..1..1....1..1..1....1..2..0 ..1..2..0....2..2..1....2..2..1....1..1..0....0..1..0....1..1..0....1..1..1 ..1..1..0....0..0..0....2..2..0....1..1..2....0..2..0....1..0..0....2..1..0 CROSSREFS Sequence in context: A223635 A223720 A223667 * A223618 A223678 A223784 Adjacent sequences:  A223823 A223824 A223825 * A223827 A223828 A223829 KEYWORD nonn AUTHOR R. H. Hardin Mar 27 2013 STATUS approved

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Last modified December 4 13:06 EST 2021. Contains 349526 sequences. (Running on oeis4.)