33269824

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={-2,0,2}.at n=30A079986
• a(n) = T(n)^2, where T(n) = A000073(n) is the n-th tribonacci number.at n=17A085697
• Number of subsets of {1,...,n} not containing {a,a+2,a+4} for any a.at n=28A209410