42491

Properties

Appears in sequences

• Primes p whose period of reciprocal equals (p-1)/7.at n=32A056212
• Number of ways to place zero or more nonadjacent 1,1 2,1 2,2 3,0 3,1 3,2 3,3 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155355
• Primes of the form (5+ a triangular number A000217).at n=33A159049
• Primes which are the sum of 6 consecutive triangular numbers A000217.at n=15A159071
• Primes p which are floor of Root-mean-cube (RMC) of prime(n), prime(n+1) and prime(n+2).at n=16A239941
• Primes of the form 2*3^a+5^b where 3^a+2*5^b is also prime, and a,b >= 1.at n=11A344175
• Prime numbersat n=4446