41257

Properties

Appears in sequences

• Numbers n such that the number formed by the digits of 2n sorted in ascending order is equal to the sum of the divisors of n after the digits of each divisor have been sorted in ascending order.at n=10A083387
• Prime(144*n).at n=29A102350
• Integers n such that n is prime and x is prime, where (x,y) is the smallest solution to the Pell equation with D = n.at n=26A109748
• a(n+1) = gpf(2*prime(a(n-1)) + prime(a(n))) where gpf = greatest prime factor, with a(0)=1, a(1)=2.at n=49A122631
• 1, followed by list of numbers n such that the number of strong primes and the number of weak primes are equal at the n-th prime.at n=8A175102
• Constant term of the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=8A192744
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and positive even determinant.at n=18A210372
• Number of nX3 0..1 arrays with row sums unimodal and column sums inverted unimodal.at n=5A223778
• Number of nX6 0..1 arrays with row sums unimodal and column sums inverted unimodal.at n=2A223781
• T(n,k) = Number of n X k 0..1 arrays with row sums unimodal and column sums inverted unimodal.at n=30A223782
• T(n,k) = Number of n X k 0..1 arrays with row sums unimodal and column sums inverted unimodal.at n=33A223782
• Primes with distinct digits: a(n) is the least prime > a(n-1) such that a(n-1) and a(n) share no common digit.at n=25A250173
• G.f.: 1/(1-x)^3 * Product_{k>=1} (1 + x^k).at n=27A325951
• Primes which yield again a prime when the digits are taken according to the lexicographically first superpermutation of corresponding order and of minimal length.at n=39A332088
• Prime numbersat n=4320