598752000

Appears in sequences

• Expansion of e.g.f. (1+3x-3x^2)/(1-x)^2.at n=11A052644
• A coefficient tree from the list partition transform relating A000129, A000142, A000165, A110327, and A110330.at n=31A131980
• Number of descents beginning and ending with an odd number in all permutations of {1,2,...,n}.at n=11A152885
• Number of descents beginning and ending with an even number in all permutations of {1,2,...,n}.at n=11A152886
• Table: T(n,k) = n!*binomial(n+1,2*k).at n=39A228955
• Triangle read by rows: T(n,k) (n>=1, 3<=k<=n+2) is the number of k-sequences of balls colored with at most n colors such that exactly three balls are the same color as some other ball in the sequence.at n=53A292930
• Expansion of e.g.f. 1 / (1 + x - x * exp(x^2)).at n=12A375588