218493

Appears in sequences

• Number of (n+3)X(n+3) binary arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=13A188096
• Number of (n+1)X(3+1) 0..2 arrays with each row and column prime, read as a base 3 number with top and left being the most significant digits.at n=4A262119
• Number of (n+1)X(5+1) 0..2 arrays with each row and column prime, read as a base 3 number with top and left being the most significant digits.at n=2A262121
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with each row and column prime, read as a base 3 number with top and left being the most significant digits.at n=23A262122
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with each row and column prime, read as a base 3 number with top and left being the most significant digits.at n=25A262122
• a(0) = ... = a(3) = 1; a(n) = a(n-4) + Sum_{k=0..n-5} a(k) * a(n-k-5).at n=33A343305