25737

Appears in sequences

• Number of permutations of length n with one 3-sequence.at n=8A002629
• Number of maximal collections of pairwise disjoint subsets {X,Y,Z} of {1, 2, ..., n} with X + Y = Z (as in A002849), with the property that n is in one of the subsets.at n=25A002848
• Lucky numbers with smallest increasing gaps (upper terms).at n=24A031885
• Triangle of numbers a(n,k) = number of permutations on n letters containing k 3-sequences (n >= 0, 0<=k<=max(0,n-2)).at n=31A047921
• Number of minimal total dominating sets in the 3 X n king graph.at n=10A332393
• Composite numbers that contain only prime digits and whose prime factors contain only prime digits.at n=38A387093