Number of partitions of 4^n - 1 into powers of 4, also equals column 0 of triangle A111845, which shifts columns left and up under matrix 4th power.

A111846

Number of partitions of 4^n - 1 into powers of 4, also equals column 0 of triangle A111845, which shifts columns left and up under matrix 4th power.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =40a(4) =1040a(5) =78240a(6) =18504256a(7) =14463224448

External references