50951

Properties

Appears in sequences

• Numbers whose least quadratic nonresidue (A020649) is 23.at n=4A025028
• Number of partitions of n that do not contain 9 as a part.at n=43A027343
• a(n) = Sum_{i=0..floor(n/2)} A047080(n,i).at n=19A047082
• Primes with 23 as smallest positive primitive root.at n=16A061335
• a(n) = Sum_{i=0..floor(n/2)} (-1)^(i+floor(n/2))*T(2i+e), where T(n) are tribonacci numbers (A000073) and e = (1/2)(1-(-1)^n).at n=20A075111
• Prime means of 12 horizontal, vertical and main diagonal sums associated with primes in A094458.at n=23A094459
• Odd numbers k for which 23 is the smallest positive i with Jacobi symbol J(i,k) != 1.at n=5A112079
• Sum of even-indexed terms of tribonacci numbers.at n=10A113300
• Diagonal sums of Riordan array A154948.at n=18A154949
• a(n) = 81*n^2 - 2247*n + 15383.at n=39A182255
• Least prime k such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x.at n=40A189559
• Least odd number k such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x.at n=40A189560
• Numbers which can be decomposed as p*q + q*r + r*p (where p < q < r are distinct primes) in more ways than any smaller number.at n=17A237992
• a(n) = 3*binomial(n,4) - 6*binomial(n,3) + 4*binomial(n,2) - 2.at n=29A335694
• a(n) is the least number that can be written in exactly n ways as p*q + q*r + p*r where (p,q,r) is an unordered triple of distinct primes.at n=40A356457
• Positions of records in A369054.at n=16A369063
• Prime numbersat n=5217