73052

Appears in sequences

• Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a three-fold rotation.at n=5A053172
• Number of n X n binary arrays, symmetric about main diagonal, with every 1 adjacent to at least one other 1 both bishopwise and rookwise but with no three 1s in a row bishopwise or rookwise.at n=8A144239
• Triangle read by rows: T(n,m) = (-1)^n*Sum_{i=0..m} (-1)^(m-i)*binomial(n-i-1, m-i)*Stirling_1(n+i+1,i+1), for 0 <= m <= n.at n=23A156528
• G.f. A(x) satisfies A(x) = 1+x*A(x)+x^2*A(x)^2+2*x^3*A(x)^3.at n=11A186239