55541

Properties

Appears in sequences

• Number of closed forest meander systems with 2n crossings.at n=7A060148
• a(n) is the smallest prime m such that prod(m) = n*length(m)*sum(m) where prod(m) is the product of the digits of m, length(m) is the number of digits of m, sum(m) is the sum of the digits of m; or 0 if no such m exists.at n=4A064023
• Primes containing the string 555.at n=8A167281
• Primes p such that 4*p is greater than the greatest prime factor of p^4 -1 and p^4 + 1.at n=15A218849
• a(n) = n-1 for n <= 2; thereafter a(n) = A238824(n-2) + A238832(n-1).at n=15A238833
• Primes having only {1, 4, 5} as digits.at n=32A260268
• Prime numbersat n=5636