-4644

Appears in sequences

• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of (3i-2 if i=j and = 0 otherwise), as in A204160.at n=15A204161
• a(n) = 3*a(n-2) - a(n-3) with a(0)=0, a(1)=3, a(2)=0.at n=14A214699