3244032

Appears in sequences

• Product of order of cycles of the permutation created by duality and reversal on the partitions of n.at n=11A036047
• Products of exactly 18 primes (generalization of semiprimes).at n=26A069279
• a(n) = 2^(n-2)*(n-2)^2+2^(n-1).at n=14A217527
• Number of maximum independent vertex sets and minimum vertex covers in the n-web graph.at n=31A297439
• a(n) is the number of subsets of {1..n} that contain exactly 5 odd numbers.at n=23A331420
• a(n) is the least number with n prime factors (counted with multiplicity) that is the concatenation of two primes.at n=17A374669
• Irregular triangle read by rows: T(r,c) is the product of the number of standard Young tableaux (A117506) and the number of semistandard Young tableaux (A262030) for partitions of r.at n=50A380611