74400

Appears in sequences

• Number of walks on cubic lattice.at n=17A005571
• a(n) = Fibonacci(n) - n^2.at n=25A014283
• Number of atoms in first n shells of type I hyperfullerene.at n=15A063497
• Largest achievable determinant of a 4 X 4 matrix whose elements are the 16 consecutive integers n-15,...,n.at n=15A097696
• G.f. A(x) satisfies A(x) = 1 + x*A(x*A(x)^2).at n=9A143500
• O.g.f.: Sum_{n>=0} 2*(n+2)^(n-1)*x^n/(1+n*x)^n.at n=8A195254
• Euler transform of period 5 sequence [ 2, 1, 1, 2, 1, ...].at n=30A205183
• Numbers k such that k and uphi(k) have the same set of prime divisors, where uphi is the unitary totient function (A047994).at n=33A329859
• Number of endofunctions on [n] such that the number of elements that are mapped to i is either 0 or a prime divisor of i.at n=9A364328
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A143500.at n=64A384580