117655
domain: N
Appears in sequences
- Number of ways to color vertices of a heptagon using <= n colors, allowing only rotations.at n=7A054621
- Number of n-bead necklaces with 7 colors.at n=7A054626
- T(n,k) = Sum_{d|k} phi(d)*n^(k/d)/k, triangle read by rows, T(n,k) for n >= 1 and 1 <= k <= n.at n=27A054630
- Triangle read by rows: row n (n >= 1) contains the numbers T(n,k) = Sum_{d|n} phi(d)*k^(n/d)/n, for k=1..n.at n=27A054631
- Number of equivalence classes of n-valued Post functions of 1 variable under action of complementing group C(1,n).at n=6A056665
- a(n) = n^(n-1) + n - 1.at n=6A173235
- Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal 0..6 arrays.at n=21A184331
- Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal 0..6 arrays.at n=27A184331
- a(n) = 7^n + n.at n=6A226199
- Numbers of the form 6^j + 7^k, for j and k >= 0.at n=43A226819
- a(n) = 7^n + 6.at n=6A253210
- a(n) = Sum_{k=1..n} gcd(k,n)^(k-1).at n=6A342370
- a(n) = Sum_{k=1..n} k^(gcd(k,n) - 1).at n=6A342394
- a(n) = Sum_{k=1..n} gcd(k,n)^(n-1).at n=6A342433
- a(n) = Sum_{k=1..n} gcd(k,n)^(gcd(k,n) - 1).at n=6A342436
- a(n) = Sum_{k=1..n} gcd(k, n)^6.at n=6A343508
- a(n) = Sum_{d|n} phi(n/d) * (-n)^(d-1).at n=6A382998