105456
domain: N
Appears in sequences
- Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={-1,0,2}.at n=42A080001
- a(n) = 4*(n^4-n^3).at n=12A160538
- a(n) = 6*n^3.at n=26A244726
- Numbers n such that 39^n + 2 is prime.at n=15A247959
- a(n) = Sum_{k=1..n^2, gcd(n,k) = 1} k.at n=25A308474
- Number of planar vertically indecomposable distributive lattices with n nodes.at n=32A345734
- Table T(n,k) = phi(phi(prime(n)^k)), n >= 1, k >= 0, read by upwards antidiagonals, where phi = A000010.at n=60A380500