22328

Appears in sequences

• a(n+1) = a(n)-th composite and a(1) = 13.at n=37A059408
• Numbers m such that sigma(m+1)+sigma(m-1) = 5*phi(m).at n=18A067242
• Numbers k such that phi(k) divides (sigma(k+1) + sigma(k-1)).at n=46A067244
• a(1) = 2, a(n) = (n-th-even n^3) - (sum of previous terms).at n=31A181509
• Numbers k such that k and k+1 are both of the form p*q^3 where p and q are distinct primes.at n=20A215173
• Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a point symmetry or a line symmetry.at n=20A292153
• Maximal coefficient of (1 - x) * (1 - x^8) * (1 - x^27) * ... * (1 - x^(n^3)).at n=44A369764
• Number of chordless cycles in the complement of the n X n antelope graph.at n=10A370110