48781

Properties

Appears in sequences

• Number of polyominoes with n cells that tile the plane isohedrally but not by translation or by 180-degree rotation (Conway criterion).at n=16A075204
• a(n) is the smallest integer k for which sigma_n(k) <= sigma_n(k-1) where sigma_n(k) = sum of the n-th powers of the divisors of k.at n=12A098475
• Primes of the form 2n^3+3.at n=10A201108
• Primes p such that p*q*r + 6 and p*q*r - 6 are primes where q and r are the next two primes after p.at n=34A240715
• Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having directed index change 1,1 2,2 -1,0 or 0,-1.at n=5A264652
• Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 1,1 2,2 -1,0 or 0,-1.at n=4A264653
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 1,1 2,2 -1,0 or 0,-1.at n=49A264655
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 1,1 2,2 -1,0 or 0,-1.at n=50A264655
• a(n) = G_n(5), where G_n(k) is the Goodstein function defined in A266201.at n=23A266204
• Twin primes both of which are the sum of three positive cubes.at n=35A272376
• Primes such that moving the last digit to the front produces a triangular number.at n=14A384954
• Prime numbersat n=5016