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A208714 Number of 7Xn 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1
64, 8192, 470596, 32826932, 2197585152, 148378294612, 10001404535216, 674377684576244, 45469018462135036, 3065730121209679464, 206705069561616591752, 13936976009963742623304, 939692881392900459541604 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 7 of A208709
LINKS
FORMULA
Empirical: a(n) = 65*a(n-1) +627*a(n-2) -30321*a(n-3) -153077*a(n-4) +5945575*a(n-5) +18847620*a(n-6) -640746940*a(n-7) -1246405727*a(n-8) +41621674173*a(n-9) +41928529920*a(n-10) -1682537371818*a(n-11) -485939889784*a(n-12) +42470072496810*a(n-13) -7922558403350*a(n-14) -670631027035048*a(n-15) +263270391431374*a(n-16) +6891425474219622*a(n-17) -2981854723927120*a(n-18) -47958233567951820*a(n-19) +19158642427965583*a(n-20) +233689019176978229*a(n-21) -80444594354181108*a(n-22) -818697039909889268*a(n-23) +236932769597213271*a(n-24) +2103792244691072929*a(n-25) -510796859975575345*a(n-26) -4022353774281500743*a(n-27) +828086071154701580*a(n-28) +5775946939404815328*a(n-29) -1026257054012229820*a(n-30) -6261507257443570876*a(n-31) +981060297866884393*a(n-32) +5132543866827487875*a(n-33) -726522411180908276*a(n-34) -3176069805803038448*a(n-35) +417716564447897336*a(n-36) +1476876535603317556*a(n-37) -186762327908567644*a(n-38) -511997227744881276*a(n-39) +64892478481747971*a(n-40) +130748670223110539*a(n-41) -17389966007346019*a(n-42) -24152905795977169*a(n-43) +3524834326494224*a(n-44) +3136398901415920*a(n-45) -522475730056453*a(n-46) -272599169920989*a(n-47) +53880467491068*a(n-48) +14382008342084*a(n-49) -3588181598882*a(n-50) -348878204572*a(n-51) +135362926032*a(n-52) -2053245952*a(n-53) -2067930688*a(n-54) +201866496*a(n-55) -5564416*a(n-56) for n>61
EXAMPLE
Some solutions for n=4
..0..1..0..0....0..1..0..0....0..1..0..1....0..0..0..1....0..1..0..0
..1..1..1..1....1..1..0..0....0..1..0..0....0..1..1..1....1..0..1..1
..0..0..1..1....0..0..1..1....0..1..1..0....1..0..0..1....1..0..0..1
..1..1..0..0....1..0..1..1....0..0..1..0....1..1..1..0....1..1..1..0
..1..0..1..1....0..0..1..0....0..0..1..1....0..1..0..0....0..0..0..1
..1..1..0..0....0..1..0..0....1..0..0..0....0..1..0..0....0..1..0..1
..1..0..1..1....1..1..1..1....0..1..0..1....0..1..1..1....0..0..0..0
CROSSREFS
Sequence in context: A302813 A303474 A305522 * A316959 A316814 A320370
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2012
STATUS
approved

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Last modified February 25 15:54 EST 2024. Contains 370332 sequences. (Running on oeis4.)