35028

Appears in sequences

• Numbers k such that sopf(k) = sopf(k+2), where sopf(k) = A008472(k).at n=27A063968
• Numbers k such that the number of steps to reach 1 in '3x+1' problem equals tau(k), the number of divisors of k.at n=42A070980
• Triangle of column sequences with a certain o.g.f. pattern.at n=41A112500
• Number of ways to place 2 queens on an n X n chessboard so that they attack each other.at n=27A144945
• Sum of the numbers in row n of the array at A242364.at n=17A243735
• Expansion of Product_{n>=1} (1 - x^(3*n))/(1 - x^n)^2 in powers of x.at n=23A278690
• Number of triangular regions into which a figure made up of a row of n adjacent congruent rectangles is divided upon drawing diagonals of all possible rectangles.at n=24A324042
• Terms of A319928 that are congruent to 4 modulo 8: Numbers k == 4 (mod 8) such that there is no other m such that (Z/mZ)* is isomorphic to (Z/kZ)*, where (Z/kZ)* is the multiplicative group of integers modulo k.at n=29A372755
• Array read by antidiagonals: Place k points in general position on each side of a regular n-gon and join every pair of the k*n boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of edges in the resulting planar graph.at n=51A392282