36751

Appears in sequences

• Expansion of g.f. 1/((1-6*x)*(1-7*x)*(1-8*x)).at n=4A020570
• Numerators of continued fraction convergents to sqrt(249).at n=8A041466
• Composite n such that (n-1)*phi(n) is a perfect square.at n=29A069953
• a(n) = 30*n^2 + 1.at n=35A158558
• Number of 2 X n 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=9A223962
• Triangle T(n,k) (n >= k >= 0) read by rows: T(n,0) = (1+(-1)^n)/2; for k>=1, set T(0,k) = 0, S(n,k) = binomial(n,k)*binomial(n+k+1,k), and for n>=1, T(n,k) = S(n,k)-T(n-1,k).at n=40A331432