15411789

Appears in sequences

• 3rd binomial transform of (1,2,0,0,0,0,0,0,...).at n=13A081038
• a(n) = 3^n(n^2 - n + 18)/18.at n=13A081909
• Triangle read by rows. T(n, k) = [x^k] P(n, x), where P(n, x) = Sum_{k=0..n} 2^(n - k) * Sum_{j=0..k} (x^j * binomial(k, j) * (2*j + 1)^n), (secant case).at n=25A363398
• Triangle read by rows. T(n, k) = [x^k] P(n, x), where P(n, x) = Sum_{k=0..n} 2^(n - k) * Sum_{j=0..k} (x^j * binomial(k, j) * ((2 - (n mod 2)) * j + 1)^n).at n=25A363400