54401

Properties

Appears in sequences

• Row 4 of array in A047666.at n=19A047668
• Primes p such that the differences between the 5 consecutive primes starting with p are (2,6,4,6).at n=13A078949
• Primes p such that p*(p-1) divides 3^(p-1)-1.at n=37A081763
• Number of skeletal perfect graphs on n nodes.at n=8A123453
• a(n) = 34*n^2 + 1.at n=40A158586
• Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,3,4 for x=0,1,2,3,4.at n=13A195974
• Smallest lesser of twin primes (A001359) with index n, or a(n)=0, if there are no such twin primes.at n=30A242807
• Prime p such that p^5 + p^3 + p - 4 and p^5 + p^3 + p + 4 are primes.at n=42A243900
• G.f.: Product_{k>=1} 1/(1-x^k)^(3*k+2).at n=9A255803
• Primes of a056240-type 3.at n=39A300359
• Primes that yield a prime when any single digit is replaced by its 10's complement.at n=37A345529
• Expansion of e.g.f. exp( x/(1-3*x)^(5/3) ).at n=5A382652
• Primes p such that p + 2, p + 8, p + 12, p + 18 and p + 20 are also primes.at n=5A383393
• Prime numbersat n=5533