46071
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=3, r=3, I={-1,1,2}.at n=21A079984
- G.f.: exp( Sum_{n>=1} (x^n/n) * Product_{d|n} (1 + n*x^d/d) ).at n=28A205476
- E.g.f. satisfies: A(x) = exp( 1/A(x)^3 * Integral A(x)^8 dx ).at n=6A232692
- a(n) = Sum_{ i=2..n-1, j=1..i-1, gcd(i,j)=1 } (n-i)*(n-j).at n=27A332612