74116

Appears in sequences

• Number of length n+3 0..3 arrays with no pair in any consecutive four terms totalling exactly 3.at n=9A246474
• a(n) = n * (7*binomial(n, 2) + 1).at n=28A329530
• E.g.f. satisfies A(x) = exp(x + 3*x^2/2 * A(x)^2).at n=6A362475
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * Sum_{j=0..floor(n/2)} (k/2)^j * (2*j+1)^(n-j-1) / (j! * (n-2*j)!).at n=51A362483