1073708010

Appears in sequences

• Number of aperiodic binary strings of length n; also number of binary sequences with primitive period n.at n=30A027375
• Row sums of triangle T(m,n) = number of solutions to 1 <= a(1) < a(2) < ... < a(m) <= n, where gcd(a(1), a(2), ..., a(m), n) = 1, in A020921.at n=29A038199
• Number of primitive (aperiodic) words of length n which contain exactly two different symbols.at n=29A056267
• Number of triangles similar to their n-th pedal, and not similar to any k-th pedal for k < n.at n=14A102536
• Number of 4 X n binary matrices that are "primitive"; that is, they cannot be expressed as a "tiling" by a smaller matrix.at n=5A291070
• Number of 5 X n binary matrices that are "primitive"; that is, they cannot be expressed as a "tiling" by a smaller matrix.at n=4A291071