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 A240427 T(n,k)=Number of nXk 0..3 arrays with no element equal to one 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 5
 3, 7, 7, 16, 35, 16, 38, 151, 151, 38, 90, 684, 1312, 684, 90, 212, 3140, 11573, 11573, 3140, 212, 500, 14357, 103021, 203213, 103021, 14357, 500, 1180, 65592, 917629, 3577618, 3577618, 917629, 65592, 1180, 2784, 299916, 8183512, 63110993 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ....3.......7.........16...........38............90............212 ....7......35........151..........684..........3140..........14357 ...16.....151.......1312........11573........103021.........917629 ...38.....684......11573.......203213.......3577618.......63110993 ...90....3140.....103021......3577618.....125356095.....4404092335 ..212...14357.....917629.....63110993....4404092335...309034856157 ..500...65592....8183512...1115948342..155205128280.21764140662553 .1180..299916...73035143..19752407566.5477493001109 .2784.1371831..652120094.349830659344 .6568.6274812.5824185148 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 FORMULA Empirical for column k: k=1: a(n) = 2*a(n-1) +2*a(n-3) k=2: [order 26] EXAMPLE Some solutions for n=3 k=4 ..2..2..0..2....3..2..3..2....2..2..2..0....2..2..2..2....2..0..2..0 ..2..2..2..0....3..1..2..1....2..0..2..2....2..0..2..2....2..2..2..2 ..0..0..0..0....2..2..3..2....2..0..2..2....2..0..2..2....3..2..0..1 CROSSREFS Column 1 is A239040 Sequence in context: A098581 A238997 A240260 * A239047 A229521 A263337 Adjacent sequences:  A240424 A240425 A240426 * A240428 A240429 A240430 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Apr 04 2014 STATUS approved

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Last modified April 6 15:41 EDT 2020. Contains 333276 sequences. (Running on oeis4.)