34986

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 22.at n=16A031700
• Numbers n such that 221*2^n-1 is prime.at n=8A050862
• a(n) = (Product k) * (Sum 1/k), where both the product and the sum are over those positive integers k, where k <= n and gcd(k,n) = 1.at n=13A056855
• Number of transitions necessary for a Turing machine to compute the differences between consecutive primes (primes written in unary), when using the instruction table below.at n=31A078612
• a(n) = (Sum 1/k) (Product k), where both the sum and product are over those k where 1 <= k <= n/2 and gcd(k,n) = 1.at n=26A099001
• Number of Dumont permutations of the first kind of length 2n avoiding the patterns 2413 and 4132. Also number of Dumont permutations of the first kind of length 2n avoiding the patterns 1423 and 3142.at n=8A125188
• a(n) = 289*n^2 + 17.at n=11A158585
• a(n) = 121*n^2 + n.at n=16A173267
• Number of n X 5 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 1 0 vertically.at n=7A207935
• Numbers n = p * q, where n, p, and q together contain all 10 digits at least once.at n=32A253172
• Numbers n for which there exists k < n such that A000203(k) = A000203(n) and A007947(k) = A007947(n), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=4A255335
• The least number k > A255334(n) for which A000203(k) = A000203(A255334(n)) and A007947(k) = A007947(A255334(n)), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=4A255423
• Numbers n such that n^3 contains the consecutive substring 2,3,5,7.at n=34A295900
• Numbers of the form Sum_{e in S} 2^(e-1) where S is a finite set of positive integers such that any element of S divides the sum of the elements of S.at n=34A337744
• Triangle read by rows: T(n,m)= Sum_{k=0..m/2} C(n-k,m-2*k)*C(n-k,m-k)*C(n,k)/C(2*k,k).at n=50A338397
• Irregular triangle read by rows: for n >= 2, 2 <= k <= floor(n/2) + 1, T(n,k) = the number of semi-meanders with n top arches, a first arch of length one and k arch groupings.at n=59A339179
• Sum of cubes of coefficients of q in the q-factorials.at n=5A380274