Triangular numbers that are one-third of another triangular number: T(m) such that 3*T(m) = T(k) for some k.

A076139

Triangular numbers that are one-third of another triangular number: T(m) such that 3*T(m) = T(k) for some k.

Terms

    a(0) =0a(1) =1a(2) =15a(3) =210a(4) =2926a(5) =40755a(6) =567645a(7) =7906276a(8) =110120220a(9) =1533776805a(10) =21362755051a(11) =297544793910

External references