1140480

Appears in sequences

• Numbers k such that phi(sigma(k)) = k.at n=11A001229
• Theta series of 10-dimensional lattice (C6 X SU(4,2)):C2 with minimal norm 4.at n=17A029770
• Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*12^j.at n=19A038326
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*11^j.at n=16A038337
• Numbers k such that k = phi(sigma(phi(sigma(k)))).at n=25A067883
• Numbers k such that k = phi(sigma(phi(sigma(phi(sigma(k)))))).at n=26A067884
• Divide integers 1..n into two sets, minimizing the difference of their products. This sequence is the smaller product.at n=14A200743
• Theta series of 10-dimensional integral lattice O_10.at n=34A306434
• Numbers which are the minimum of a cycle in the map x -> phi(sigma(x)).at n=28A376256