19198306

Appears in sequences

• Smallest number k in a set of three consecutive triangular numbers that are sphenic.at n=7A348185
• Smallest number in a set of three consecutive triangular numbers each with three prime factors (counted with multiplicity).at n=8A349696
• Expansion of 1/((1-x) * (1-3*x)^3).at n=11A367591