565248

Appears in sequences

• Expansion of Jacobi theta constant (theta_2/2)^24.at n=7A014809
• Droll numbers: numbers > 1 whose sum of even prime factors equals the sum of odd prime factors.at n=28A019507
• Binomial transform of decagonal numbers A001107.at n=12A086950
• a(n) = S(3*n,3)/S(n,3) where S(n,m) = Sum_{k=0..n} binomial(n,k)*Fibonacci(m*k).at n=3A087423
• Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate in a cycle.at n=19A291781
• a(1)= 2. For n > 1, a(n) is the least number k such that k, k - a(n-1) and k + a(n-1) all have n prime divisors counted by multiplicity.at n=14A365852