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A202792 Number of nX5 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically 1
12, 724, 23436, 702846, 21649928, 669872090, 20696263392, 639259508770, 19746821708510, 609991818060458, 18842950812606880, 582067589653914988, 17980345177885556288, 555421459716439841384, 17157234238650483438818 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A202795

LINKS

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

FORMULA

Empirical: a(n) = 29*a(n-1) -5*a(n-2) +1820*a(n-3) +3756*a(n-4) +14798*a(n-5) +39177*a(n-6) -33008*a(n-7) -120144*a(n-8) -276809*a(n-9) -534984*a(n-10) +521787*a(n-11) +1495342*a(n-12) +136066*a(n-13) -826372*a(n-14) -258636*a(n-15) -55508*a(n-16) -65340*a(n-17) +26654*a(n-18) +9760*a(n-19) +1452*a(n-20) +3060*a(n-21)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A061025 A042749 A219568 * A341560 A317337 A089036

Adjacent sequences:  A202789 A202790 A202791 * A202793 A202794 A202795

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 24 2011

STATUS

approved

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Last modified August 9 17:13 EDT 2022. Contains 356026 sequences. (Running on oeis4.)