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A238992
Number of nX3 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of the sum of elements above it, modulo 4
1
15, 203, 2365, 25601, 270671, 2827709, 29422487, 305525459, 3170576253, 32890537051, 341164909807, 3538555502557, 36701472408455, 380656870553721, 3948062617070389, 40947979951532603, 424699049401817205
OFFSET
1,1
COMMENTS
Column 3 of A238997
LINKS
FORMULA
Empirical: a(n) = 13*a(n-1) +40*a(n-2) -914*a(n-3) +683*a(n-4) +21799*a(n-5) -40268*a(n-6) -255576*a(n-7) +617879*a(n-8) +1651695*a(n-9) -4744854*a(n-10) -5850014*a(n-11) +20400821*a(n-12) +9443201*a(n-13) -49172224*a(n-14) +1794964*a(n-15) +63874690*a(n-16) -34792348*a(n-17) -46269446*a(n-18) +85331340*a(n-19) +19168016*a(n-20) -137730200*a(n-21) +2475600*a(n-22) +191881992*a(n-23) -35419208*a(n-24) -200659312*a(n-25) +29452144*a(n-26) +50974176*a(n-27) -43973440*a(n-28) +100095104*a(n-29) +81128448*a(n-30) -69032960*a(n-31) -38481920*a(n-32) +7651328*a(n-33) +983040*a(n-34) -524288*a(n-35)
EXAMPLE
Some solutions for n=4
..0..0..0....0..3..3....3..0..3....1..1..3....0..1..1....3..3..1....1..0..0
..1..1..3....0..3..2....3..0..2....0..1..0....0..0..0....0..3..0....0..1..0
..0..0..0....1..1..2....1..0..2....0..3..3....1..2..0....3..3..2....0..0..3
..1..1..3....1..2..0....0..3..3....1..2..3....1..0..1....1..2..0....1..1..3
CROSSREFS
Sequence in context: A207835 A178507 A012566 * A216465 A215903 A373294
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 08 2014
STATUS
approved