40903

Properties

Appears in sequences

• Numbers that are the sum of 6 positive 9th powers.at n=16A003395
• Number of nonempty subsequences {s(k)} of 1..n such that the difference sequence is palindromic.at n=24A053599
• a(n) = Sum_{k=1..n} (lcm(n,n-1,...,n-k+2,n-k+1)/lcm(1,2,...,k)).at n=16A093431
• Primes of the form 1 + A094125(k) = 1 + 3*2^k + 2*3^k.at n=5A095379
• a(n) = 5*2^n - 4*n - 5.at n=12A126284
• Values of k in A071580.at n=19A258081
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 155", based on the 5-celled von Neumann neighborhood.at n=32A286114
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 324", based on the 5-celled von Neumann neighborhood.at n=32A287632
• Triangle read by rows: T(n,k) is the number of planar tanglegrams of size n with 0 <= k < n leaf-matched pairs. A leaf matched pair is a pair of non-leaf vertices (u,v) in the tanglegram such that the induced subtrees rooted and u and v also form a tanglegram (equivalently, the leaves in these two subtrees are matched by the matching that forms the original tanglegram).at n=51A349409
• Prime numbersat n=4284