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 A240334 Number of nX3 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4 1
 7, 48, 316, 1543, 6271, 22116, 69596, 199504, 528924, 1310622, 3062243, 6794265, 14399820, 29296378, 57452518, 108986486, 200594945, 359164115, 627034377, 1069540186, 1785635484, 2922647926, 4696491195, 7419012596, 11534573228 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A240338 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (1/1556755200)*n^13 + (13/479001600)*n^12 + (709/239500800)*n^11 - (1097/43545600)*n^10 + (4523/2419200)*n^9 - (600197/14515200)*n^8 + (21519737/21772800)*n^7 - (738857411/43545600)*n^6 + (5266122739/21772800)*n^5 - (29277165523/10886400)*n^4 + (450145058857/19958400)*n^3 - (224785067849/1663200)*n^2 + (23586754661/45045)*n - 987842 for n>12 EXAMPLE Some solutions for n=4 ..0..3..0....0..0..0....3..0..0....0..0..0....0..0..3....0..0..3....0..0..3 ..0..0..3....0..0..0....0..3..0....0..3..0....3..0..3....3..0..3....0..0..3 ..0..3..0....0..3..3....3..3..1....0..0..3....0..3..3....3..3..3....0..3..2 ..3..2..2....0..0..3....3..2..2....0..0..3....3..3..2....3..3..2....3..3..3 CROSSREFS Sequence in context: A088143 A124880 A227100 * A171312 A186161 A081106 Adjacent sequences: A240331 A240332 A240333 * A240335 A240336 A240337 KEYWORD nonn AUTHOR R. H. Hardin, Apr 04 2014 STATUS approved

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Last modified May 31 04:44 EDT 2023. Contains 363061 sequences. (Running on oeis4.)