7348320

Appears in sequences

• Expansion of e.g.f.: (1-x)/(1-3*x).at n=7A052563
• Triangle of coefficients associate with the expansion of the K_3 graph matric characteristic polynomial as a Sheffer sequence: M = {{0, 1, 1}, {1, 0, 1}, {1, 1, 0}} f(t)=-t^3+3t+2 p(x,t)=1/(2*t^3+3*t^2-1)^x=1/(t^3*f(1/t))^x.at n=35A137946
• Triangle T(n, k) = n!*q^k/(n-k)! if floor(n/2) > k-1 otherwise n!*q^(n-k)/k!, with q = 3, read by rows.at n=60A174377
• a(n) = 3^(n-1) * n! * Catalan(n-1).at n=5A221954
• Number of endofunctions on [n] where the largest cycle length equals 6.at n=3A246216