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

 

Logo

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!)
A255155 Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1 1
331, 1285, 5615, 24076, 102481, 437238, 1863728, 7949259, 33910512, 144564567, 616312719, 2628123398, 11206734215, 47784070740, 203747023090, 868773624459, 3704429017070, 15795531088173, 67351480077567, 287184144088210 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A255159

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +6*a(n-2) +21*a(n-3) +53*a(n-4) +33*a(n-5) -49*a(n-6) -255*a(n-7) -298*a(n-8) +550*a(n-9) +1137*a(n-10) -8*a(n-11) -2536*a(n-12) -2445*a(n-13) +3641*a(n-14) +3226*a(n-15) -5655*a(n-16) -2727*a(n-17) +4934*a(n-18) +670*a(n-19) -3942*a(n-20) -1351*a(n-21) +794*a(n-22) -44*a(n-23) +94*a(n-24) +519*a(n-25) -35*a(n-26) +72*a(n-27) +117*a(n-28) -36*a(n-29) for n>31

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A255159

Sequence in context: A142824 A038647 A152311 * A154083 A237475 A060894

Adjacent sequences:  A255152 A255153 A255154 * A255156 A255157 A255158

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)