31123

Properties

Appears in sequences

• Expansion of x/(1 - 4*x - 11*x^2).at n=7A015534
• Numbers whose set of base-13 digits is {1,2}.at n=36A032933
• Discriminants of imaginary quadratic fields with class number 19 (negated).at n=44A046016
• String formed from first n quaternary digits found in decimal expansion of Pi.at n=4A065837
• Numbers prime(k) such that A068863(k) = prime(k).at n=24A068868
• Duplicate of A068868.at n=24A085136
• Home primes whose homeliness is 4.at n=34A133962
• Primes p such that the multiplicative order of 2 modulo p is (p-1)/7.at n=29A152307
• Primes of the form (p^2 - 1)/8 - p, where p is also a prime.at n=21A165567
• Primes in A168472.at n=18A168473
• Primes p such that q*p +- (p mod q) are primes, for q=8.at n=36A178416
• Numbers n such that 10^n - 93 is prime.at n=26A178531
• Primes which are the sum of three distinct positive cubes in two or more distinct ways.at n=29A180088
• Primes of the form 8*k^2 + 6*k - 1 for positive k.at n=33A187677
• Primes of the form x^3 + y^3 + 1, where x and y are primes.at n=12A214175
• Limiting value of the iterated process of factoring n and concatenating prime powers (in decimal) in the order of increasing primes.at n=51A239448
• Primes p such that q = p^2 + 10 and q^2 + 10 are also prime.at n=34A243368
• a(1)=1; starting with n>1, concatenate distinct divisors which are in A050376 in increasing order and repeat until a term of A050376 is reached (a(n)=0 if no term of A050376 is ever reached).at n=51A248713
• Union of all unique coefficients of all powers of the g.f. A(x) of this sequence, starting with A(0)=2 and A'(0)=3.at n=73A262975
• Primes p such that the sum of the cubes of digits of p equals the sum of digits of p^3.at n=12A291052