The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A262753 Number of (n+2) X (2+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits. 1
 4, 9, 25, 100, 361, 1369, 5476, 21609, 85849, 343396, 1371241, 5480281, 21921124, 87665769, 350625625, 1402502500, 5609860201, 22439141209, 89756564836, 359025060969, 1436097847129, 5744391388516, 22977555967081, 91910204694361 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 4*a(n-1) + 9*a(n-3) - 36*a(n-4) - 8*a(n-6) + 32*a(n-7). Empirical g.f.: x*(4 - 7*x - 11*x^2 - 36*x^3 + 24*x^4 + 24*x^5 + 32*x^6) / ((1 - x)*(1 - 2*x)*(1 - 4*x)*(1 + x + x^2)*(1 + 2*x + 4*x^2)). - Colin Barker, Dec 31 2018 EXAMPLE Some solutions for n=4: ..0..1..0..1....1..1..1..1....1..0..1..0....1..0..1..0....1..0..1..0 ..0..0..0..0....1..1..1..1....1..0..1..0....1..0..1..0....1..0..1..0 ..0..0..0..0....1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..1 ..1..0..1..0....1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..1 ..1..1..1..1....1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..1 ..1..1..1..1....1..1..1..1....1..0..1..0....1..0..1..0....1..0..1..0 CROSSREFS Column 2 of A262759. Sequence in context: A220444 A117678 A167045 * A055851 A025494 A087374 Adjacent sequences:  A262750 A262751 A262752 * A262754 A262755 A262756 KEYWORD nonn AUTHOR R. H. Hardin, Sep 30 2015 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 19 04:49 EST 2021. Contains 340263 sequences. (Running on oeis4.)