259308

Appears in sequences

• If p and q are twin primes then pq + 1 is always divisible by 3, except for (p,q)=(3,5). Sequence gives values of (pq + 1)/3.at n=33A165280
• Totally multiplicative sequence with a(p) = 7*(p+1) for prime p.at n=23A166647
• Numbers with prime factorization p^2*q^3*r^4 where p, q, and r are distinct primes.at n=25A190115
• Numbers m such that phi(m) is a power of the product of the distinct prime factors of m.at n=30A211413
• Integer areas A of the integer-sided triangles such that the inradius and the radius of the three excircles are perfect squares.at n=8A233317
• Partition array in Abramowitz-Stegun order for the number of ways of putting n stones into a rectangular m X n grid of squares such that each of the m rows contains at least one stone.at n=39A258152
• Number of chiral pairs of rows of n colors with exactly 3 different colors.at n=11A305623
• Numbers m such that phi(m) = rad(m)^3, where phi is the Euler totient function (A000010) and rad is the squarefree kernel function (A007947).at n=5A328274