a(n) = n * 2^n * binomial(4*n, n).

A378804

a(n) = n * 2^n * binomial(4*n, n).

Terms

    a(0) =0a(1) =8a(2) =224a(3) =5280a(4) =116480a(5) =2480640a(6) =51684864a(7) =1060899840a(8) =21541478400a(9) =433812234240

External references