104952

Appears in sequences

• a(n) = 729*n^2 - 2*n.at n=11A158394
• Triangle read by rows, (Sum_{k=0..n} T[n,k]*x^k) / (1-x)^(n+1) are generating functions of the columns of A287698.at n=30A287697
• Triangle read by rows: T(n,k) is the number of ordered triples of n-permutations with exactly k common descents, n>=0, 0<=k<=max(0,n-1).at n=27A334394