77171

Properties

Appears in sequences

• Primes that contain digits 1 and 7 only.at n=18A020455
• Numbers k such that the "inventory" A063850 of k is a perfect square.at n=28A079465
• If k is a number with exactly two distinct decimal digits, say a and b, neither of which is 0 (i.e., a member of A101594), define the self-complement of k, SC(k), to be the number obtained by replacing a with b and vice versa. E.g. SC(232233) = 323322. Sequence contains primes p such that SC(p) is also a prime.at n=25A083983
• Transmutable primes: Primes with distinct digits d_i, i=1,m (2<=m<=4) such that simultaneously exchanging all occurrences of any one pair (d_i,d_j), i<>j results in a prime.at n=31A108388
• 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, 0, 0), (0, 0, -1), (1, -1, 0), (1, 1, 1)}.at n=9A149665
• Primes having only {0, 1, 7} as digits.at n=42A199327
• Primes of the form 7n^2 - 4.at n=10A201850
• Prime numbersat n=7582