112640

Appears in sequences

• a(n) = binomial(n,3)*2^(n-3).at n=9A001789
• Theta series of D*_11 lattice.at n=27A022064
• 13-almost primes (generalization of semiprimes).at n=30A069274
• a(n) = gcd(d(n!^3), d(n!)), where d() is the number of divisors function.at n=33A069783
• a(n) = 2^n*binomial(n,2).at n=11A100381
• Numbers n such that A002113(n) is a triangular number.at n=25A101034
• The second left hand column of triangle A167591.at n=9A167592
• a(n) = binomial(n+9, 9)*8^n.at n=3A196280
• a(n) = 2*a(n-1) + 4*a(n-2) with n>1, a(0)=0, a(1)=4.at n=10A209084
• 3-quantum transitions in systems of N>=3 spin 1/2 particles, in columns by combination indices.at n=25A213345
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 462", based on the 5-celled von Neumann neighborhood.at n=18A288438
• a(n) is the number of subsets of {1,2,...,n} that contain exactly two odd numbers.at n=21A330592
• 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=12A338384
• Fixed points of map n -> A366275(n).at n=27A366277