27437

Properties

Appears in sequences

• Fibonacci sequence beginning 1, 10.at n=18A022100
• Least m such that if r and s in {1/1, 1/4, 1/9,..., 1/n^2} satisfy r < s, then r < k/m < s for some integer k.at n=41A024827
• Multiplicity of highest weight (or singular) vectors associated with character chi_64 of Monster module.at n=40A034452
• Row sums of triangle A048882.at n=4A048965
• a(n) = 3*a(n-1) - a(n-2) with a(0)=1, a(1)=11.at n=9A056123
• a(n) = A077708(n+1)/A077708(n).at n=12A077709
• G.f. A(x) satisfies A(A(A(..(A(x))..))) = B(x) (10th self-COMPOSE of A) such that the coefficients of B(x) consist only of numbers {1,2,3,..,10}, with B(0) = 0.at n=5A112121
• Primes p for which the period length of 1/p is a perfect power, A001597.at n=42A128948
• The smallest prime p that makes the pair p+/-6n both primes while no other pair of p+/-6k+6*n, 0<k<n both primes.at n=54A139602
• K-bit primes p such that p-2^i and p+2^i are composite for 0<=i<=K-1.at n=18A153352
• Primes p such that both pi(p) and the concatenation of pi(p) and p are prime, where pi is the prime counting function.at n=40A155032
• a(n) = 76*n^2 + 1.at n=19A158767
• Sums of NE-SW diagonals of triangle A172171.at n=19A172173
• Primes of the form 4n^3 + 1.at n=6A199307
• Primes of the form 10n^3-3.at n=1A201037
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^4<x^4+y^4.at n=34A211652
• Primes formed by inserting a semiprime between the semiprime's ordered factors.at n=6A229480
• Odd numbers m that are neither of the form p + 2^k nor of the form p - 2^k with 2^k < m, k >= 1, and p prime.at n=37A255967
• Number of partitions of n^3 into at most two parts.at n=38A274324
• Primes p such that 6p - 1 and 6p + 1 are twin primes and ((6p-1)^2 + (6p+1)^2) / 10 is prime.at n=21A283957