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 A240279 Number of nX2 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4 1
 2, 8, 19, 38, 114, 251, 612, 1656, 3758, 9630, 24258, 57548, 146898, 360946, 880960, 2217967, 5429271, 13419200, 33424298, 82079277, 203571196, 504206276, 1242741927, 3081338174, 7616293969, 18815746878, 46600839533, 115150972966 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A240284 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-2) +10*a(n-3) -3*a(n-4) -6*a(n-5) -3*a(n-6) +8*a(n-7) -7*a(n-8) -9*a(n-9) -4*a(n-10) +13*a(n-11) -14*a(n-12) +17*a(n-13) -a(n-15) EXAMPLE Some solutions for n=4 ..3..1....3..1....3..3....3..3....3..1....3..3....3..1....3..1....3..1....3..1 ..2..0....3..1....2..2....3..2....3..1....3..2....2..2....2..0....3..1....2..0 ..2..0....2..1....2..1....2..1....3..2....3..1....2..0....2..1....3..1....2..0 ..2..1....3..3....2..1....3..1....2..1....2..1....3..3....3..3....2..2....3..1 CROSSREFS Sequence in context: A031327 A193389 A030504 * A327728 A000158 A101427 Adjacent sequences: A240276 A240277 A240278 * A240280 A240281 A240282 KEYWORD nonn AUTHOR R. H. Hardin, Apr 03 2014 STATUS approved

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Last modified November 29 07:03 EST 2023. Contains 367429 sequences. (Running on oeis4.)