61491

Appears in sequences

• Numbers whose base-4 representation contains exactly four 0's and four 3's.at n=21A045085
• a(0) = 1, a(1) = 2; for n>1, a(n) = a(n-1) + a(n-2) + 4.at n=20A182415
• Number of n-length words w over binary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.at n=18A213290
• Number of n X 3 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=5A283277
• Number of nX6 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=2A283280
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=30A283282
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=33A283282