-28160

Appears in sequences

• Triangle read by rows: T(n,k) is the coefficient of x^k (0<=k<=n) in the monic characteristic polynomial of the n X n matrix with 3's on the diagonal and 1's elsewhere (n>=1). Row 0 consists of the single term 1.at n=56A103247
• Triangle of tanh numbers.at n=48A111593
• Triangle of coefficients of p(x,n) = (1/3)*(1-x)^(n+1)*Sum_{m >= 0} ((5*m+4)^n - (5*m+1)^n)*x^m, read by rows.at n=18A154855
• G.f. satisfies A(x) = (1 + x/A(x))/(1 - x).at n=10A366363
• Determinant of n X n Fibonacci word matrix.at n=28A370724
• a(n) = Sum_{k=0..n} k^3 * (-1)^k * 3^(n-k) * binomial(n,k).at n=10A383150