136371

Appears in sequences

• Number of bipartite partitions of n white objects and 4 black ones.at n=23A000465
• a(n) = n * a(n-1) - Sum_{k=1..n-2} a(k) with a(1) = 0 and a(2) = 1.at n=8A056199
• Triangle, read by rows, defined by: T(n,k) = (k+1)*T(n,k+1) - Sum_{j=1..n-k-1} T(j,0)*T(n,j+k+1) for n>k with T(n,n)=1 for n>=0.at n=47A117396
• Odd composite numbers m for which A000111(m) == (-1)^( (m-1)/2 ) (mod m).at n=25A180942