25366

Appears in sequences

• a(n) = number of types of conjugacy classes in GL(n,q) (this is independent of q).at n=13A003606
• "CHJ" (necklace, identity, labeled) transform of 2,2,2,2...at n=5A032328
• Numbers k such that 7*10^k + 8*R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=10A103067
• a(n) = C(3,n) DELTA C(0,n).at n=40A147724
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element within a city block distance of two, and containing the value n(n+1)/2-2.at n=20A212039
• The number of permutations of length n sortable by 2 prefix block transpositions.at n=18A228394
• E.g.f.: Sum_{n>=0} (exp((n+1)*x) - 1)^n.at n=4A248798
• Array read by downward antidiagonals: A(n,k) = Sum_{i=0..n-1} Sum_{j=0..k+1} binomial(n-1,i)*binomial(k+1,j)*A(i,j) with A(0,k) = 1, n >= 0, k >= 0.at n=32A383410