317576

Appears in sequences

• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j) = gcd(prime(i), prime(j)) (A204118).at n=29A204119
• Number of length n+3 0..7 arrays with no pair in any consecutive four terms totalling exactly 7.at n=3A246478
• T(n,k)=Number of length n+3 0..k arrays with no pair in any consecutive four terms totalling exactly k.at n=48A246479
• Number of length 4+3 0..n arrays with no pair in any consecutive four terms totalling exactly n.at n=6A246483
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, x_2, x_3, n)^4.at n=19A372929