23702

Appears in sequences

• Number of nonisomorphic relations with a nontrivial symmetry.at n=5A030243
• a(n) = 121*n^2 - n.at n=13A157960
• a(n) = 484*n^2 - 2*n.at n=6A158329
• a(n) = 196*n^2 - 14.at n=10A158553
• Numbers n such that n^2048 + (n+1)^2048 is prime.at n=23A274235
• Number of set-systems (without {}) on n vertices that are closed under intersection.at n=5A326901
• Number of subsets of {1,2,...,n} such that no two elements differ by 1, 2, 3, or 5.at n=33A375185