18439

Properties

Appears in sequences

• From table of maximal epacts e(p) and corresponding primes p, for x_1=2, x_{m+1} = (x_m)^2+1; sequence gives p.at n=32A014424
• Numbers k such that 62^k - 61^k is prime.at n=6A062628
• Prime sum of n-th group of successive primes in A073684.at n=30A073682
• a(n) is the least positive integer such that the integer part of the arithmetic-geometric mean of a(n) and 1 is equal to Fibonacci(n).at n=17A090854
• Primes congruent to 31 mod 59.at n=33A142758
• Primes congruent to 17 mod 61.at n=33A142815
• 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, 1), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.at n=7A151129
• Primes of the form 2n^2 + 7.at n=10A201475
• Primes of the form 8*k^2 + 7.at n=5A201704
• Emirps whose binary conversion remains emirp when read in decimal.at n=11A226972
• Primes whose binary and ternary representations are also prime when read in decimal.at n=27A236537
• Primes p such that p^2*q^2*r^2 + 12 and p^2*q^2*r^2 - 12 are primes where q and r are next two primes after p.at n=18A240725
• Pointed hyper-extensional graphs whose nodes/edges are all keystones and whose nodes/edges are all disposable.at n=4A268528
• Primes p of the form 14*k+1 for which there is a solution to x^7 == 2 mod p.at n=42A270802
• Coinage sequence: a(n) = A018227(n)-7.at n=44A272000
• Primes p such that 2*p-1 and (2*p-1)^2+(2*p)^2 are also prime.at n=28A347165
• Echo primes: primes p such that the greatest prime factor of p-1 is a suffix of p.at n=34A383907
• Prime numbersat n=2112