288120

Appears in sequences

• a(n) = n*(n-1)^4/2.at n=15A019583
• One seventh of sept-factorial numbers.at n=4A034834
• Triangle read by rows: Bell polynomial of the second kind B(n,k) with argument vector (7, 42, 210, 840, 2520, 5040, 5040).at n=12A188066
• Triangle by rows T(n,k), showing the number of meanders with length (n+1)*4 and containing (k+1)*4 Ls and (n-k)*4 Rs, where Ls and Rs denote arcs of equal length and a central angle of 90 degrees which are positively or negatively oriented.at n=33A197653
• Triangular array read by rows. T(n,k) is the number of rooted labeled trees on n nodes such that the root node has degree k. n>=2, 1<=k<=n-1.at n=23A206429
• Triangle, read by rows, where T(n,k) = k!*C(n, k)*7^(n-k) for n>=0, k=0..n.at n=32A218017
• Base-7 complementary numbers: n equals the product of the 7 complement (7-d) of its base-7 digits d.at n=10A298977
• a(n) = A025487(n) * A324576(n) = A025487(n) * A276086(A025487(n)).at n=16A324577
• a(n) = A002182(n) * A324581(n) = A002182(n) * A276086(A002182(n)).at n=9A324582
• a(n) = A108951(n) * A276086(A108951(n)).at n=19A324887
• a(n) = (n^4 + 5*n^3 + 11*n^2 + 7*n)/6.at n=35A332697