78330

Appears in sequences

• Hexagonal prism numbers: a(n) = (n + 1)*(3*n^2 + 3*n + 1).at n=29A005915
• Expansion of Product_{m>=1} (1 + m*q^m).at n=25A022629
• Numbers with exactly 5 distinct prime factors each of which is a palindrome.at n=17A046403
• Numbers k having exactly 5 distinct prime factors, the largest of which is greater than or equal to sqrt(k) (i.e., sqrt(k)-rough numbers with exactly 5 distinct prime factors).at n=27A115959
• a(n) = 64*n^2 - 2*n.at n=34A158067
• Let P be a one-move "rider" with move set M={(1,2)}; a(n) is the number of non-attacking positions of two indistinguishable pieces P on an n X n board.at n=19A222308
• Number of compositions (ordered partitions) of n into distinct squarefree parts.at n=44A331846
• Number of ways to tile a hexagonal strip made up of n equilateral triangles, using singles and triples.at n=25A365352
• Number of vertices formed when n equally spaced points are placed around a circle and all pairs of points are joined by an interior arc whose radius equals the circle's radius.at n=34A371254