137808

Appears in sequences

• Triangle T(n,k) read by rows, where e.g.f. for T(n,k) is exp(x*y)*log(1+x)/(1-x).at n=38A073480
• Triangle read by rows in which row n gives coefficients of polynomial R_n(y) that satisfies R_n(1/3) = 9^n, where R_n(y) forms the initial (n+1) terms of g.f. A097191(y)^(n+1).at n=31A097190
• Number of ways to place 2 nonattacking knights on an n X n board.at n=22A172132
• Number of compositions of 7*n-5 into parts 6 and 7.at n=18A373937
• a(n) = Sum_{k=0..floor(n/2)} binomial(k+2,3*n-6*k+2).at n=38A390035