856800

Appears in sequences

• Expansion of e.g.f. 1/((1-2*x)*(1-x^2)).at n=7A052600
• Commuting permutations: number of ordered triples of permutations f, g, h in Symm(n) which all commute.at n=7A072169
• Fibonacci integral quotients associated with the dividends in A159950 and the divisors in A003481.at n=1A159951
• a(n) = A000203(A255334(n)).at n=43A255412
• Highly composite numbers of class 3 (see comment in A275239).at n=29A275241
• Numbers m such that A049417(A049417(m)) = k*m for some k where A049417 is the infinitary sigma function.at n=30A318182
• Array read by antidiagonals: T(n,k) is the number of k-tuples of permutations of [n] that pairwise commute.at n=62A362827