74521

Properties

Appears in sequences

• Numbers k such that 62^k - 61^k is prime.at n=7A062628
• Primes of the form (prime(k-1)+1)*(prime(k+1)-1) + 1, k>1.at n=14A087106
• a(n) = a(n-1) + a(n-2) + a(n-3) - a(n-4); a(0)=0, a(1)=1, a(2)=1, a(3)=1.at n=23A116201
• Primes of the form 9n^2 - 8.at n=17A201961
• Primes with distinct digits: a(n) is the least prime > a(n-1) such that a(n-1) and a(n) share no common digit.at n=27A250173
• Primes whose base-9 representation is a square in base 10.at n=19A267821
• a(n) = (3 * a(n-3) + a(n-1) * a(n-5)) / a(n-6), a(0) = a(1) = ... = a(5) = 1.at n=19A275176
• Centered 23-gonal primes.at n=8A276263
• Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=10A281711
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=11A316643
• Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3.at n=42A318527
• Primes q such that 15*q-4, 15*q-2, 15*q+2 and 15*q+4 are all primes.at n=24A342717
• Prime numbersat n=7350