30586

Appears in sequences

• a(0) = 1, a(1) = 2; for n>=2 a(n) is the number of degree-n reducible polynomials over GF(2).at n=15A058766
• Number of irreducible nonpositively curved triangulations of an n-gon: All internal vertices have at valence at least 6 and no diagonals of the n-gon are allowed.at n=13A060050
• Number of compositions of n into pairwise relatively prime parts.at n=23A101268
• Number of all polyhedra (tetrahedra of any orientation and octahedra) of any size, formed when intersecting a regular tetrahedron by planes parallel to its sides and dividing its edges into n equal parts.at n=23A216175
• Numbers k such that 4*10^k + 49 is prime.at n=25A290878