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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
OFFSET
1,1
COMMENTS
Column 5 of A202795
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 24 2011
STATUS
approved