

A228680


Number of n X 5 binary arrays with no two ones adjacent horizontally, diagonally or antidiagonally.


1



13, 97, 809, 6737, 56549, 475809, 4008817, 33795201, 284980061, 2403420097, 20270798553, 170971640209, 1442058561397, 12163101107393, 102590452275041, 865306832676993, 7298499493581101, 61559793235182241, 519231197740651273
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OFFSET

1,1


COMMENTS

Column 5 of A228683.


LINKS

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


FORMULA

Empirical: a(n) = 12*a(n1) 27*a(n2) 32*a(n3) +49*a(n4) +20*a(n5) 5*a(n6).
Empirical: G.f. x*(13+59*x+4*x^264*x^315*x^4+5*x^5) / ( 112*x+27*x^2+32*x^349*x^420*x^5+5*x^6 ).  R. J. Mathar, Sep 02 2013


EXAMPLE

Some solutions for n=4
..0..0..1..0..0....0..0..0..0..0....0..0..1..0..0....0..1..0..0..1
..0..0..0..0..1....0..0..1..0..1....0..0..0..0..1....0..0..0..0..1
..1..0..0..0..0....0..0..0..0..0....1..0..0..0..1....0..0..0..0..1
..0..0..1..0..0....0..0..0..0..1....0..0..0..0..0....1..0..0..0..0


CROSSREFS

Cf. A228683.
Sequence in context: A049294 A198480 A126508 * A158795 A075899 A006976
Adjacent sequences: A228677 A228678 A228679 * A228681 A228682 A228683


KEYWORD

nonn


AUTHOR

R. H. Hardin, Aug 30 2013


STATUS

approved



