61291

Properties

Appears in sequences

• T(n,1) + T(n,2) + ... T(n,n), where T is the array in A026098.at n=43A026101
• Primes p such that x^27 = 2 has no solution mod p, but x^9 = 2 has a solution mod p.at n=26A059354
• Primes p such that x^9 = 2 has a solution mod p, but x^(9^2) = 2 has no solution mod p.at n=28A070185
• a(n) is the least prime beginning with prime(n) such that the concatenation a(1)a(2)...a(n) is a prime.at n=17A090510
• 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, 0), (-1, 1, -1), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.at n=10A148810
• Primes p == 3 mod 4 whose index as prime divides their index as a Gaussian prime (in the first quadrant, as defined in A103431, for example).at n=5A190637
• Primes which become squares when the digits are rotated once to the right.at n=28A234925
• Smallest of five consecutive primes in arithmetic progression with common difference 90 and equal digit sums.at n=29A253232
• Prime numbersat n=6167