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A208417 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 1 vertically 1
16, 256, 1260, 5139, 18395, 55404, 161975, 440436, 1153772, 2954920, 7358199, 18095775, 43901536, 105437749, 251614320, 596577792, 1408720236, 3315012663, 7779082371, 18219094740, 42597676899, 99472838332, 232059665500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A208420

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) -28*a(n-3) -4*a(n-4) +124*a(n-5) +22*a(n-6) -334*a(n-7) -121*a(n-8) +609*a(n-9) +318*a(n-10) -744*a(n-11) -365*a(n-12) +523*a(n-13) +50*a(n-14) -302*a(n-15) +682*a(n-16) +206*a(n-17) -1062*a(n-18) -316*a(n-19) +974*a(n-20) +164*a(n-21) -554*a(n-22) +112*a(n-23) +194*a(n-24) -262*a(n-25) -58*a(n-26) +300*a(n-27) -41*a(n-28) -135*a(n-29) +14*a(n-30) +62*a(n-31) -54*a(n-32) +8*a(n-33) +20*a(n-34) +2*a(n-35) -13*a(n-36) +7*a(n-37) -2*a(n-39) -a(n-40) +a(n-41)

EXAMPLE

Some solutions for n=4

..0..1..1..1..1....1..1..1..1..1....0..1..0..1..0....1..1..1..1..1

..1..1..1..1..1....0..1..1..1..1....0..1..0..1..1....1..1..1..1..0

..0..1..0..1..0....0..1..1..1..1....1..0..1..0..0....0..1..0..1..1

..1..1..0..1..1....1..1..1..1..1....0..1..0..1..1....0..1..0..1..0

CROSSREFS

Sequence in context: A207860 A207810 A208284 * A208025 A207805 A016744

Adjacent sequences:  A208414 A208415 A208416 * A208418 A208419 A208420

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2012

STATUS

approved

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Last modified October 23 09:45 EDT 2019. Contains 328345 sequences. (Running on oeis4.)