31793

Properties

Appears in sequences

• Members of A083989 whose 10's complement is also a member of A083989.at n=26A083991
• Primes from merging of 5 successive digits in decimal expansion of the Golden Ratio, (1+sqrt(5))/2.at n=13A103809
• Primes p such that p's set of distinct digits is {1,3,7,9}.at n=20A108386
• First primes of arithmetic progressions of 7 primes each with the common difference 210.at n=24A227282
• Values of k such that L(k)*L(k+1)-1 is a prime, where L(k) is the k-th Lucas number (A000032).at n=27A271430
• Primes p such that A001175(p) = 2*(p+1)/7.at n=32A308785
• Primes p such that 2*p+1 and 4*p^2+1 are also prime.at n=39A333803
• Numbers m with decimal expansion (d_k, ..., d_1) such that d_i = m ^ i mod 10 for i = 1..k.at n=39A344749
• a(n) is the number of tetrapods standing on the four edges of an n X n grid, so that no two feet are the same distance apart and no foot is on a corner. Tetrapods with congruent footprints are counted only once.at n=22A353447
• Primes p such that the 10's complement A089186(p) and the concatenations of p and A089186(p) and of A089186(p) and p are all prime.at n=23A372082
• Prime numbersat n=3418