51977

Properties

Appears in sequences

• Primes of the form k^2 - 7.at n=23A028883
• Number of partitions satisfying cn(0,5) + cn(2,5) < cn(1,5) + cn(4,5) and cn(0,5) + cn(3,5) < cn(1,5) + cn(4,5).at n=44A039885
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = a(3) = 3.at n=18A049927
• Primes of the form pq - 6, where p and q are consecutive primes.at n=18A099775
• Primes of the form A037074(k) - 6, where A037074(k) is a twin prime product.at n=7A162834
• Primes p such that (p+nextprime(p))/2 is a perfect square.at n=32A225195
• Lesser of consecutive primes whose average is a perfect power.at n=35A242380
• Number of connected undirected unlabeled loopless multigraphs with 4 vertices and n edges.at n=40A290778
• Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=8A302076
• Prime numbersat n=5318