19766

Appears in sequences

• Number of words of length n (n >= 1) over a two-letter alphabet having a minimal period of size n-1.at n=15A019310
• Row sums of the triangle described in A082200.at n=26A082203
• Semiprimes in A103373.at n=19A103393
• Number of n-bead necklaces labeled with numbers -1..1 not allowing reversal, with sum zero and three times sum of squares <= n*(1)*(1+1).at n=13A208807
• Number of n X n 0..1 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=4A222762
• Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=4A222766
• T(n,k)=Number of nXk 0..1 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=40A222769
• Number of 5Xn 0..1 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=4A222773
• G.f. satisfies A(x) = 1 + x*A(x)^6 / (1 + x*A(x)^6).at n=6A365218