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 A239642 Number of n X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4 0
 2, 20, 1182, 320314, 471203608, 3608789598890, 144633234041629586, 30422021680410630610470, 33561342025910573963641656948 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A239649 LINKS EXAMPLE Some solutions for n=3 ..1..0..0....1..0..0....1..3..3....3..0..0....3..0..0....3..0..0....1..0..3 ..1..3..1....2..1..0....2..3..2....2..1..1....2..0..3....2..3..3....1..0..0 ..3..0..2....3..2..0....3..2..2....1..2..1....2..3..0....2..0..0....3..1..2 CROSSREFS Sequence in context: A012790 A273194 A013144 * A112359 A308231 A179594 Adjacent sequences:  A239639 A239640 A239641 * A239643 A239644 A239645 KEYWORD nonn AUTHOR R. H. Hardin, Mar 23 2014 STATUS approved

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Last modified September 27 03:21 EDT 2020. Contains 337380 sequences. (Running on oeis4.)