74168

Appears in sequences

• Smaller of Smith brothers.at n=37A050219
• Numbers k such that the k-th triangular number contains each of the 10 decimal digits exactly once.at n=17A115939
• Number of subsets of {1..n} (including empty set) such that the pairwise products of distinct elements are all distinct.at n=18A196724
• Number of defective 4-colorings of an n X 4 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..3 order.at n=11A229574
• Number of unlabeled graphs with loops spanning n vertices.at n=7A322700
• a(n) = [x^n] Product_{j=1..n, k=1..n} (1 + x^(k^j)).at n=14A369578