162120

Appears in sequences

• Denominators of continued fraction convergents to sqrt(507).at n=11A041969
• Expansion of e.g.f. (1-x)/(1-5x+3x^2).at n=5A052629
• Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=8A281761
• T(n,k) = [0<k<=n] * n*(T(n-1,k-1)+T(n-1,k)) + [k=0 and n>=0]; triangle T(n,k), n >= 0, 0 <= k <= n, read by rows.at n=32A326659