2016840
domain: N
Appears in sequences
- Sept-factorial numbers.at n=5A051188
- Seventh column of triangle A075502.at n=3A076002
- Septuple factorial, 7-factorial, n!7, n!!!!!!!, a(n) = n*a(n-7) if n > 1, else 1.at n=35A114799
- a(n) = (n^3 - n)*7^n.at n=4A128965
- Triangle read by rows: T(n,k) = n^k * k!.at n=33A153188
- Triangle T(n, k) = Product_{j=0..k} (j*n + prime(m)), with T(n, 0) = prime(m) and m = 4, read by rows.at n=32A153272
- Base-7 complementary numbers: n equals the product of the 7 complement (7-d) of its base-7 digits d.at n=12A298977