54497

Properties

Appears in sequences

• Fibonacci sequence beginning 5, 18.at n=18A022142
• Primes of the form 20n^2+8n+1.at n=20A154405
• a(n) = 25*n^3 - n*(5*n+1)/2 + 1.at n=12A167467
• a(n) = b_f(n) where f is the 3-periodic sequence [-1,1,5] (see comments).at n=18A186267
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 179", based on the 5-celled von Neumann neighborhood.at n=7A270623
• Primes of the form H(m,k) = F(k+1)*F(m-k+2) - F(k)*F(m-k+1), where F(m) is the m-th Fibonacci number and m >= 0, 0 <= k <= m.at n=44A360932
• a(n) = Sum_{k=1..n} (binomial(n, k) * 2^k) (mod 3^k).at n=11A386661
• Prime numbersat n=5544