74604

Appears in sequences

• Triangle: Number of asymmetric semigroups of order n with k idempotents.at n=25A058113
• Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five, six or seven distinct values for every i,j,k<=n.at n=8A211585
• Expansion of 1/(1 - x - x^2 - x^4 + x^5 + x^7).at n=23A260710
• E.g.f. A(x) satisfies A(x) = 1 + log(1+x) * A(2*x).at n=5A355084