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A205435 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..3 introduced in row major order 1
443, 10275, 302148, 10308161, 375775257, 14089784418, 534222700494, 20344347242650, 776078866294049, 29624881788204184, 1131149173680436232, 43194361906664947639, 1649496572765035824729, 62991579705321975196437 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A205440

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 84*a(n-1) -2478*a(n-2) +31310*a(n-3) -105688*a(n-4) -1447728*a(n-5) +16566156*a(n-6) -52644616*a(n-7) -112948204*a(n-8) +1286364942*a(n-9) -3365762496*a(n-10) +989417336*a(n-11) +13822996149*a(n-12) -35396231412*a(n-13) +42837090738*a(n-14) -29104419996*a(n-15) +11035031040*a(n-16) -2101181472*a(n-17) +147246336*a(n-18)

EXAMPLE

Some solutions for n=4

..0..0..1..0....0..0..0..0....0..1..1..2....0..1..0..0....0..0..0..0

..2..0..0..0....0..1..1..1....1..1..2..2....0..0..0..1....0..0..0..0

..0..0..1..1....0..0..0..0....3..1..1..2....3..3..0..0....0..0..0..0

..3..0..0..0....0..1..0..1....1..1..2..2....3..0..0..1....0..0..0..0

..0..0..1..0....1..1..1..1....0..1..1..2....3..3..0..0....0..0..0..0

CROSSREFS

Sequence in context: A293978 A345307 A205604 * A098254 A242540 A111496

Adjacent sequences:  A205432 A205433 A205434 * A205436 A205437 A205438

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 27 2012

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)