18367

Properties

Appears in sequences

• Primes of the form m^2 + 3m + 9, where m can be positive or negative.at n=40A005471
• Numbers k such that prime(k) + prime(k+1) is a square.at n=39A064397
• Numbers n such that p(n) + p(n+1) is a square and n is prime.at n=8A064398
• a(n) = floor((5/4)^n).at n=44A065565
• Primes of the form floor((5/4)^k).at n=10A067906
• Numbers m such that for increasing b the numbers of zeros in base b representation of m are monotonically decreasing, 1<b<m.at n=49A089969
• Let r_1 = 1. Let r_{m+1} = r_1 + 1/(r_2 + 1/(r_3 +...(r_{m-1} + 1/r_m)...)), a continued fraction of rational terms. Then a(n) is the sum of the (positive integer) terms in the simple continued fraction of r_n.at n=11A138744
• Primes of the form 2*3*5*7*k + 97.at n=44A141899
• Primes congruent to 6 mod 61.at n=34A142804
• Unique terms in sequence A210144.at n=37A214196
• Primes of the form sigma(k) + tau(k) + phi(k), where sigma(k) = A000203(k), tau(k) = A000005(k) and phi(k) = A000010(k).at n=9A229266
• Number of espalier polycubes of a given volume in dimension 3.at n=30A229915
• Sum of the largest two parts in the partitions of 4n into 4 parts with smallest part equal to 1.at n=15A239186
• Least prime q such that p(q*n) is prime, where p(.) is the partition function given by A000041.at n=18A257662
• Iterations at which Langton's Ant living on triangular tiling reaches the distance of n from the origin for the first time.at n=38A275303
• G.f. A(x) satisfies: Sum_{n>=0} ( x^n + (-1)^n*A(x) )^n = 1.at n=10A317997
• Expansion of e.g.f. Product_{k>=1} 1/(1 - x^k)^(mu(k)^2/k), where mu = Möbius function (A008683).at n=7A318912
• Primes whose binary complement (A035327) is a square.at n=37A323067
• Prime numbersat n=2104