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 A202866 Number of 4 X 4 0..n arrays with row and column sums one greater than the previous row and column. 0
 2, 1346, 41852, 491892, 3436102, 17232446, 68544440, 229551288, 672922218, 1773763178, 4286374004, 9634559948, 20367690798, 40850961478, 78277647728, 144113836976, 256112415570, 441063276882, 738481048172, 1205470385252 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A202864. LINKS Table of n, a(n) for n=1..20. FORMULA Empirical: a(n) = (2789/37800)*n^10 + (2789/3780)*n^9 + (6673/2520)*n^8 + (73/21)*n^7 - (1673/1800)*n^6 - (929/180)*n^5 - (14359/7560)*n^4 + (521/189)*n^3 + (3487/3150)*n^2 - (17/21)*n. EXAMPLE Some solutions for n=3 ..0..2..0..3....0..1..0..2....2..0..2..2....0..0..1..3....0..0..1..3 ..0..2..1..3....0..1..0..3....0..3..1..3....0..2..3..0....1..2..1..1 ..2..0..3..2....1..1..3..0....2..1..3..2....1..0..2..3....2..0..2..2 ..3..2..3..0....2..1..2..1....2..3..2..2....3..3..0..1....1..3..2..1 CROSSREFS Cf. A202864. Sequence in context: A298757 A020526 A247821 * A265587 A244614 A094477 Adjacent sequences: A202863 A202864 A202865 * A202867 A202868 A202869 KEYWORD nonn AUTHOR R. H. Hardin, Dec 25 2011 STATUS approved

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Last modified September 16 03:13 EDT 2024. Contains 375959 sequences. (Running on oeis4.)