26119

Properties

Appears in sequences

• Primes p such that number of primes produced according to rules stipulated in Honaker's A048853 is 3.at n=20A050665
• Numbers k such that x^k + x^7 + 1 is irreducible over GF(2).at n=43A057477
• Numbers k>7 such that x^k + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1 is irreducible over GF(2).at n=30A057485
• Numbers n such that 8*10^n + R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=9A103071
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.at n=8A149727
• 1/3 of the number of permutations of 2 indistinguishable copies of 1..n with exactly 2 local maxima.at n=5A152494
• Primes p such that 2*p^3-+15 are also prime.at n=33A174364
• Number of zero-sum -n..n arrays of 5 elements with first through fourth differences also in -n..n.at n=14A201440
• Primes p such that 2*p+1 is divisible by the sum of digits of p+1.at n=42A267542
• a(n) = A273059(4n+2).at n=28A275918
• a(n) = Sum_{i=1..n, gcd(i,n)=1} i*phi(i) where phi is Euler's totient function A000010.at n=54A333291
• Prime numbersat n=2872