152520

Appears in sequences

• Magnetization for hexagonal lattice.at n=16A007207
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives y numbers.at n=29A125491
• Number of ways to write n as the root-mean-square (RMS) of a set of distinct primes.at n=61A163974
• The hyper-Wiener index of the Kneser graph K(n,2) (n>=5).at n=27A228307