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 A240272 Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4 1
 3, 7, 35, 157, 713, 3263, 14895, 68101, 311509, 1424689, 6516312, 29807450, 136351053, 623728103, 2853225545, 13052077767, 59706884718, 273130241113, 1249440509707, 5715597380517, 26146153523610, 119606300969406 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A240271 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) for n>28 EXAMPLE Some solutions for n=4 ..3..2..2..0....3..2..3..3....3..2..0..0....3..2..0..3....3..0..2..2 ..2..1..1..2....3..1..1..2....3..2..0..0....3..2..2..2....3..2..2..0 CROSSREFS Sequence in context: A055487 A121130 A006099 * A053530 A215575 A266049 Adjacent sequences: A240269 A240270 A240271 * A240273 A240274 A240275 KEYWORD nonn AUTHOR R. H. Hardin, Apr 03 2014 STATUS approved

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Last modified September 26 17:49 EDT 2023. Contains 365666 sequences. (Running on oeis4.)