291200

Appears in sequences

• Number of primitive polynomials of degree n over GF(5).at n=10A027741
• Triangle of coefficients of certain polynomials (exponents in decreasing order).at n=40A046757
• Numbers k not divisible by 6 such that sigma(k) > 3*k.at n=25A126104
• Numbers m such that gcd(s1,s2) = number of the Collatz iterations of m where s1 is the sum of the odd terms and s2 the sum of the even terms in the Collatz trajectory.at n=32A281195
• Irregular triangle read by rows where T(n,k) is the number of labeled loop-graphs covering n vertices with k edges.at n=53A369199
• a(n) = (1/2) * Sum_{k=0..floor(n/3)} 2^k * binomial(2*k+2,2*n-6*k+1).at n=23A387552