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 A240251 Number of 2Xn 0..3 arrays with no element equal to the sum of elements to its left or the sum of the elements above it or the sum of the elements diagonally to its northwest or the sum of the elements antidiagonally to its northeast, modulo 4 1
 6, 0, 8, 40, 152, 540, 1578, 5912, 18528, 65302, 212372, 733426, 2426106, 8296612, 27678444, 94137686, 315632340, 1069956004, 3597752554, 12172795856, 40997298324, 138562059118, 467091216442, 1577693637918, 5321097135168 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A240250 LINKS R. H. Hardin, Table of n, a(n) for n = 1..167 FORMULA Empirical: a(n) = a(n-1) +13*a(n-2) -2*a(n-3) -43*a(n-4) -28*a(n-5) +4*a(n-6) -a(n-7) +89*a(n-8) +142*a(n-9) -137*a(n-10) +71*a(n-11) +263*a(n-12) -232*a(n-13) +48*a(n-14) +179*a(n-15) -182*a(n-16) +52*a(n-17) +106*a(n-18) +34*a(n-19) +10*a(n-20) +12*a(n-21) +22*a(n-22) -36*a(n-23) +4*a(n-24) +4*a(n-25) EXAMPLE Some solutions for n=4 ..2..1..2..2....3..2..2..2....3..1..2..1....1..3..3..2....2..1..1..1 ..3..0..0..1....1..0..3..3....2..0..3..3....2..0..1..1....3..0..2..2 CROSSREFS Sequence in context: A156015 A201898 A193336 * A114530 A085673 A117492 Adjacent sequences:  A240248 A240249 A240250 * A240252 A240253 A240254 KEYWORD nonn AUTHOR R. H. Hardin, Apr 03 2014 STATUS approved

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Last modified February 18 04:48 EST 2020. Contains 332011 sequences. (Running on oeis4.)