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A262797 Number of (2+2)X(n+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits. 1
0, 144, 528, 4704, 56880, 787536, 8423568, 98893920, 1186930800, 14416385040, 171393010320, 2053738997856, 24644935370160, 296067439483344, 3550012697702544, 42596001968362080, 511152044529285360 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 2 of A262795.
LINKS
FORMULA
Empirical: a(n) = 14*a(n-1) -52*a(n-2) +440*a(n-3) +1940*a(n-4) -42136*a(n-5) +130832*a(n-6) -1272928*a(n-7) +234026*a(n-8) +34403252*a(n-9) -63189880*a(n-10) +952057808*a(n-11) -516283820*a(n-12) -10970711960*a(n-13) +9550612240*a(n-14) -282398311520*a(n-15) +96140026255*a(n-16) +1404615957550*a(n-17) -501871284980*a(n-18) +34714525551160*a(n-19) -5440122625184*a(n-20) -68377213321664*a(n-21) +6191483638912*a(n-22) -1653436086997760*a(n-23) +68472989925120*a(n-24) +824525429054976*a(n-25) -5699099907072*a(n-26) +19800008497133568*a(n-27) -63128491278336*a(n-28) -757541895340032*a(n-29) -18181005488160768*a(n-31)
EXAMPLE
Some solutions for n=4
..0..1..1..1..1..0....1..1..0..0..1..0....1..0..0..0..1..1....1..1..0..0..1..0
..0..1..1..1..1..0....1..0..1..0..0..0....1..1..0..0..1..0....1..0..0..0..1..1
..1..0..0..0..1..1....1..0..1..1..0..1....0..1..1..1..1..0....1..0..1..1..0..1
..1..0..1..0..0..0....0..1..0..1..0..0....0..0..0..1..0..1....0..0..0..1..0..1
CROSSREFS
Cf. A262795.
Sequence in context: A281240 A014770 A131528 * A017402 A155707 A017522
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 02 2015
STATUS
approved

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Last modified April 13 05:19 EDT 2024. Contains 371639 sequences. (Running on oeis4.)