Expansion of 1/((1-3x)(1-9x)(1-27x)(1-81x)).

A226804

Expansion of 1/((1-3x)(1-9x)(1-27x)(1-81x)).

Terms

    a(0) =1a(1) =120a(2) =10890a(3) =914760a(4) =74987451a(5) =6098153040a(6) =494603769780

External references