20959

Properties

Appears in sequences

• Primes p such that the sum of the digits of p is not prime, but the sum of each digit raised to the 4th power is prime.at n=15A091368
• Primes congruent to 36 mod 61.at n=38A142834
• First differences of A145646.at n=10A145647
• The least number s having exactly n threes in the continued fraction of sqrt(s).at n=40A206583
• Number of (w,x,y,z) with all terms in {0,...,n} and at least one of them is the range of {w,x,y,z}.at n=14A212746
• Primes p such that p*q*r + 6 and p*q*r - 6 are primes where q and r are the next two primes after p.at n=17A240715
• Let F(g,p) be the frequency of g up to prime nextprime(p+1). Primes p such that F(2,p) = F(4,p) and g = 2 or 4.at n=35A274122
• Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=4A298623
• Number of nX5 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=4A298626
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=40A298629
• Prime-indexed primes q such that prime(q)-q-1 is a prime indexed prime.at n=13A318751
• Smallest prime p such that x^n - x - 1 splits modulo p.at n=5A377496
• Primes having only {0, 2, 5, 9} as digits.at n=24A386050
• Prime numbersat n=2357