22273

Properties

Appears in sequences

• Powers of fifth root of 19 rounded up.at n=17A018170
• Primes followed by a [4,2,4] prime difference pattern of A001223.at n=38A052378
• McKay-Thompson series of class 42b for Monster.at n=55A058676
• a(2n) = concatenation of 4n+1 and 4n+2, a(2n+1) = concatenation of the two most nearly equal numbers whose product is a(2n).at n=23A068517
• Smallest prime which is a concatenation of n primes.at n=4A069837
• Smaller of a pair of consecutive primes having only prime digits.at n=12A082755
• k-th upper twin prime, where k is the n-th Fibonacci number.at n=13A093307
• a(n) is the smallest integer k for which sigma_n(k) <= sigma_n(k-1) where sigma_n(k) = sum of the n-th powers of the divisors of k.at n=11A098475
• Primes of the form 512n+257.at n=7A105131
• Primes with prime number of only prime digits (i.e., 2, 3, 5, 7).at n=19A124888
• Triangle read by rows: T(n,k) is the number of unlabeled digraphs on n nodes with k arcs up to reversing the arcs, k=0..n*(n-1).at n=56A126066
• Triangle read by rows: T(n,k) is the number of unlabeled digraphs on n nodes with k arcs up to reversing the arcs, k=0..n*(n-1).at n=66A126066
• Primes arising in A093483.at n=22A127903
• Primes p of Erdos-Selfridge class 4+ with largest prime factor of p+1 not of class 3+.at n=15A129472
• a(n) = Fibonacci(n) mod n^3.at n=42A132636
• Prime quadruples: 2nd term.at n=20A136720
• Prime numbers p such that p +- ((p-1)/8) are primes.at n=14A137771
• Prime numbers containing the string 222.at n=6A166580
• Primes of the form k * m^m + 1 with k < m^m.at n=25A180362
• Expansion of q^(1/4) * (eta(q) / eta(q^3))^3 in powers of q.at n=42A199659