107519

Appears in sequences

• T(4,n) with T(n,m) as in A063394.at n=9A063397
• Least m which can be written as i*j+i+j in n different ways: A072670(m)=n.at n=43A072671
• a(n) is the smallest number k representable as x*y+x+y, where x>=y>1, in exactly n ways, or -1 if no such k exists.at n=41A253975