28405

Appears in sequences

• Terms of A050530 with four prime divisors.at n=14A053340
• Number of binary strings of length n with no substrings equal to 0000 0010 or 0101.at n=14A164418
• Triangular array read by rows: T(n,k) is the number of transitive relations on {1,2,...,n} that have exactly k reflexive points, n>=0, 0<=k<=n.at n=19A245767
• a(0) = 1, a(1) = 2, a(2n) = A019565(a(n)), a(2n+1) = A065642(a(n)).at n=66A285332
• Number of Dyck paths of semilength n and height exactly 8.at n=5A289421
• Composite numbers m such that A309132(m) <= m.at n=10A309235
• Number of non-isomorphic multiset partitions of weight n with empty intersection and no part containing all the vertices.at n=10A319775
• Triangular array read by rows. T(n,k) is the number of idempotent Boolean relation matrices on [n] with exactly k reflexive points, n >= 0, 0 <= k <= n.at n=19A360984