2361960

Appears in sequences

• Number of transpositions (interchanges of adjacent digits, sometimes called inversions) needed to change all n-digit base 3 numbers into nondecreasing order.at n=10A069515
• Partial products of A007425.at n=9A175596
• a(n) = (n/4)*3^(n/2)*((1+sqrt(3))^2+(-1)^n*(1-sqrt(3))^2).at n=20A187273
• Denominators of mass formula for connected vacuum graphs on n nodes for a phi^4 field theory.at n=20A226259
• Expansion of (1+3*x)^2/(1-3*x)^2.at n=10A236967
• Wiener index of the n X n X n grid graph.at n=8A292045
• Integers that can be written m = k*tau(k) = q*tau(q) where (k, q) is a primitive solution of this equation and tau(k) is the number of divisors of k.at n=28A338384