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 A239995 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 one plus the sum of the elements diagonally to its northwest, modulo 4 1
 3, 13, 61, 256, 1117, 5012, 22592, 102336, 465662, 2123857, 9698188, 44317651, 202610817, 926532786, 4237612923, 19382872561, 88661747469, 405570672096, 1855255219753, 8486814865920, 38822908166872, 177595801954595 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A240000 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 8*a(n-1) -20*a(n-2) +34*a(n-3) -84*a(n-4) +92*a(n-5) -68*a(n-6) +222*a(n-7) +13*a(n-8) -251*a(n-9) +25*a(n-10) -495*a(n-11) +485*a(n-12) -44*a(n-13) -180*a(n-14) +554*a(n-15) -648*a(n-16) +14*a(n-17) +152*a(n-18) -190*a(n-19) -140*a(n-20) +397*a(n-21) -273*a(n-22) +75*a(n-23) +167*a(n-24) -136*a(n-25) +27*a(n-26) EXAMPLE Some solutions for n=5 ..3..3....0..3....0..3....3..3....3..3....3..3....3..3....0..0....0..3....3..3 ..0..3....3..2....0..0....0..2....0..3....0..3....0..3....3..3....0..2....0..3 ..0..3....2..1....3..3....0..0....2..2....0..3....3..2....3..3....3..2....3..3 ..2..2....2..1....0..2....3..2....2..1....3..2....3..1....2..2....2..2....2..1 ..2..0....2..0....2..0....3..2....2..0....3..3....2..1....3..1....0..0....3..1 CROSSREFS Sequence in context: A112568 A104089 A334150 * A319924 A108143 A101368 Adjacent sequences: A239992 A239993 A239994 * A239996 A239997 A239998 KEYWORD nonn AUTHOR R. H. Hardin, Mar 30 2014 STATUS approved

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Last modified February 2 21:10 EST 2023. Contains 360024 sequences. (Running on oeis4.)