859329

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=24A079986
• a(n) = T(n)^2, where T(n) = A000073(n) is the n-th tribonacci number.at n=14A085697
• a(n) is the smallest nonprime k such that tau(k + n) = tau(k) + n , where tau(n) is the number of divisors of n (A000005).at n=32A099642
• Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=28A207399
• Number of subsets of {1,...,n} not containing {a,a+2,a+4} for any a.at n=22A209410
• Squares whose arithmetic mean of digits is 6 (i.e., the sum of digits is 6 times the number of digits).at n=31A316486
• Discriminants with exactly 2 associated cyclic cubic fields.at n=33A343002
• Discriminants with at least 2 associated cyclic cubic fields.at n=34A343024