login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1
1

%I #4 Apr 10 2015 13:32:09

%S 1731,15291,140031,1226781,10791281,95609517,845074953,7462718887,

%T 65946786795,582793811989,5149483657453,45501162090307,

%U 402065378129851,3552750855171131,31392826101389087,277394754458635673

%N Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1

%C Column 5 of A256810

%H R. H. Hardin, <a href="/A256807/b256807.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..1..0..1..1..1..0..1....1..1..0..1..1..0..1....1..0..1..1..0..1..1

%e ..1..1..1..0..1..1..1....1..0..1..1..0..1..1....1..1..0..1..1..0..1

%e ..1..1..0..1..1..1..0....1..1..1..1..1..1..0....1..1..1..1..1..1..1

%e ..1..1..1..1..0..1..1....1..1..1..1..1..1..1....1..1..1..0..1..1..0

%e ..1..1..1..1..1..0..1....1..1..1..1..0..1..1....1..1..1..1..1..1..1

%Y Cf. A256810

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 10 2015