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A205905 Number of (n+1)X5 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same 1
8655, 201324, 4541781, 103275303, 2360853939, 54239297565, 1250218771158, 28878115209258, 667894994869566, 15459018475815381, 357976634882583516, 8291732415842513991, 192090307757723752467, 4450477846710880043316 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A205909
LINKS
FORMULA
Empirical: a(n) = 62*a(n-1) -1386*a(n-2) +11601*a(n-3) +37334*a(n-4) -1402156*a(n-5) +8112454*a(n-6) +20112424*a(n-7) -429442340*a(n-8) +1341292500*a(n-9) +5847074437*a(n-10) -51597260975*a(n-11) +70472278141*a(n-12) +566992209760*a(n-13) -2526500393431*a(n-14) +450191596923*a(n-15) +22295419270616*a(n-16) -52717172999884*a(n-17) -45060158513455*a(n-18) +396047554855322*a(n-19) -457472576082498*a(n-20) -1043776713145252*a(n-21) +3404844423723074*a(n-22) -1197350582588960*a(n-23) -9098656253016276*a(n-24) +15236188354750220*a(n-25) +4094402694384937*a(n-26) -39760466148688414*a(n-27) +37109341732902721*a(n-28) +32463351269124833*a(n-29) -91993317591866842*a(n-30) +35639915467891059*a(n-31) +92215467025648534*a(n-32) -113417807283761307*a(n-33) -25484245602377084*a(n-34) +145480332850476630*a(n-35) -83824787546915791*a(n-36) -72001714089904407*a(n-37) +123310989333122207*a(n-38) -39509355966059248*a(n-39) -45212637002521533*a(n-40) +48811306383451709*a(n-41) -11618794355008442*a(n-42) -9942114110480912*a(n-43) +9234879875329581*a(n-44) -2962728380601197*a(n-45) -166187696539693*a(n-46) +631974321032014*a(n-47) -363511722711940*a(n-48) +125051423697451*a(n-49) -23031407367226*a(n-50) +280165727722*a(n-51) +544031561844*a(n-52) +53053507564*a(n-53) -58825050384*a(n-54) +10254509520*a(n-55) -792992160*a(n-56) for n>57
EXAMPLE
Some solutions for n=4
..2..2..1..2..0....1..2..1..1..0....1..0..2..0..1....2..0..0..2..2
..2..0..1..2..2....2..1..0..2..1....2..0..2..0..0....2..2..0..2..0
..2..0..1..2..0....1..2..1..0..2....2..2..2..0..1....0..2..2..2..0
..2..0..1..2..2....0..0..2..1..0....2..0..2..0..1....2..2..0..2..0
..2..0..1..1..2....2..1..0..2..1....0..0..2..0..0....1..2..0..2..2
CROSSREFS
Sequence in context: A031771 A205732 A205913 * A205763 A253617 A203737
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 01 2012
STATUS
approved

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Last modified April 19 16:52 EDT 2024. Contains 371794 sequences. (Running on oeis4.)