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A251493
Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock summing to 4 5 6 7 or 8.
1
2270, 86946, 3361296, 130169514, 5042543734, 195351371872, 7568125133206, 293198072124546, 11358843131212260, 440055171232822378, 17048264028944367306, 660470155275254978524, 25587404413719974204546
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OFFSET
1,1
COMMENTS
Column 2 of
A251499
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 46*a(n-1) -243*a(n-2) -1796*a(n-3) +12368*a(n-4) -4170*a(n-5) -57120*a(n-6) +67165*a(n-7) +32054*a(n-8) -72328*a(n-9) +15648*a(n-10) +13056*a(n-11) -4608*a(n-12)
EXAMPLE
Some solutions for n=2
..1..0..2....3..0..3....3..0..3....3..1..0....3..2..3....2..2..1....3..1..2
..0..3..1....3..1..2....3..0..2....1..2..2....2..1..2....2..1..1....1..1..1
..0..1..1....0..3..1....0..3..0....1..3..1....1..1..2....2..0..3....0..3..0
CROSSREFS
Sequence in context:
A125253
A308792
A236606
*
A235519
A235522
A235650
Adjacent sequences:
A251490
A251491
A251492
*
A251494
A251495
A251496
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Dec 03 2014
STATUS
approved
